[Edit] This GPS is no longer functional. There is a known issue where a lithium battery soldered to the main board eventually loses its charge and at first the unit will no longer store settings or track info, and eventually will not acquire a GPS fix at all. I have a acquired a new GPS with similar functionality that I like even better, stay tuned for details!
As promised, here are the details of the new GPS thingy.

Overview
There are a number of GPS options on the market these days, but there is one feature that sets this one apart: internal track logging. What this means is that the GPS can log your waypoints as you travel, and store them in its internal memory, without requiring a connection to a laptop, phone or PDA. So for cycling, hiking or jogging where navigation is not required, you can literally turn it on and throw it in a backpack, and then upload your waypoint data to a computer for further processing later. DeLorme claims battery life of about 9 hours with no bluetooth connected. I’m getting about 5-6 with mine, so I will most likely be ordering a new battery.
For management and navigation, the Blue Logger can connect to a cell phone or laptop via bluetooth only, it has no USB connection at all. If your PC does not have a bluetooth adapter, not to worry! A USB bluetooth adapter can be purchased for $10.00 or less.
Details
I purchased my Blue Logger for $30 via Craigslist, and it came with only the AC charger. I’ve also seen them on eBay for $30-$50 with variations of the original accessories. You can also, for now, still purchase them new directly from DeLorme, via their Earthmate website. The unit is available with no mapping software for $130.00, or for varying prices with different mapping software. They also have a variety of accessories available.
That being said, you should know that there is a huge selection of free software that will allow you to interface with the Blue Logger, should you decide to pick one up used from Craigslist or eBay! Below is what I have settled on for use with mine, and there are others out there if you google “gps software.”
Hardware
If, like I did, you got one that is missing a charger or other accessory, you can purchase them as needed:
• AC Charger – $10.00
• Car Charger – $19.99 or $5.99 (It uses the same charger as a number of older PDA’s like the iPaq 3000 series)
• Spare Battery – $29.99 (very handy to have an extra, or as a replacement for the OEM if you bought used)
• External Antenna – $32.95 (Mine has excellent reception here in Colorado, I’ve had no need for the extra antenna)
• USB Bluetooth Adapter – $12.99 or $5.99 (I bought the $12.99 model on sale locally for $9.99 and it works great. Geeks.com tends to have better prices, but their inventory changes so keep checking back)
To operate the Blue Logger, hold down the power button until the red LED lights up, then release it quickly. The flashing blue light indicates it is ready for a bluetooth connection, and the flashing green light indicates it has a satellite lock. If the satellite LED turns to solid red, the battery is running low. Once the unit is turned on, toss it in your backpack, pocket or whatever and it will happily log away.
PC Software
In order to use your GPS in a meaningful way, you will need some software for it. Specifically, you will need the Blue Logger Manager application in order to adjust the settings and retrieve the logs from your GPS. DeLorme has it available for free here. If they should ever take that link down, I have saved a copy of it here. This software is for Windows, and I have also run it in Linux via Wine. Use of the application is fairly straightforward, and DeLorme has documentation for it here. With the management application, you can enable logging, and set the parameters for how it will mark waypoints when it logs. Once this is set and enabled, any time the GPS is powered on and has a GPS lock, it will log until it either loses the GPS lock or is powered off.
After you have logged a trip, the resulting data can be processed and displayed a number of ways. In order to retrieve the data from the GPS, use the management application described above, and save the data to your PC as a .gpl file. This file can then be converted to a standard .gpx file with the program GPSBabel. Usage of this program is simple. Open the program and browse to your .gpl file, set the format of the input file to DeLorme GPL, browse to where you want to save the converted file and give it a name, select the checkboxes for Waypoints and Tracks and select GPX XML for the output file format:
**Please note: the default location for the .gpl files is
C:\DeLorme Docs\GPSLogs

When all the necessary selections have been made, click the ‘Let’s Go’ Button. When this completes, the .gpx output file is ready to be used by other programs.
One program that can open .gpx files directly is Google Earth, available for free here. After you have installed Google Earth, run it, and then from the ‘File’ menu, choose open. Set the file type to ‘Gps (*.gpx *.loc) and then browse to where the .gpx output file from the previous step was saved.

Select the file and click ‘Open’ and the route extracted from the GPS will be displayed in Google earth:

In Google Earth, there is a plethora of options to play with. Explore and have fun!
Online GPX processing
In addition to viewing your trip data in Google Earth, there are also several online tools with interesting features. For a quick and easy view of a saved trip, try http://utrack.crempa.net Click browse to choose your .gpx file, select your options and then click Generate Report. Your map will be displayed on an interactive Google map, accompanied by elevation, speed charts and other statistical analysis.
**Please note: by default, GPSBabel will output a GPX 1.0 formatted file, which contains speed information recorded in KM/H by the GPS unit. uTrack will import this data directly as KM/H, but will label it MPH if that is what you selected. In order to correct this, when converting the file to .gpx, go to the options menu and select ‘Output: GPX XML’ and in the resulting dialog box, check the box for ‘Target GPX version for output’ and enter 1.1.


Click OK and then output your .gpx file as described above. The resulting GPX 1.1 file will not include speed data from the GPS unit, and then uTrack will calculate it, correctly, from the waypoints of your track. While uTrack is good for quick viewing of your trip data, it would be even more cool to be able to save your trips permanently and display them on your own blog or website, like this.
This functionality is facilitated by TrimbleOutdoors by signing up for a free account. After you create your account, go to the Map My Story link and click on ‘Import Now’ under Option #3. This will walk you through their gpx import wizard, after which can save and share your trip, as well as grab the code for embedding your trip into your own site!
**Please note: As per the GPX 1.0 issue mentioned above, TrimbleOutdoors cannot import a GPX 1.0 file at all, it will just hang. You must output it as a 1.1 file for it to work!
Mobile Software
Because the Blue Logger is an NMEA compliant bluetooth GPS device, it can also interface with bluetooth enabled PDA’s and smartphones. In order to do this you will need some software. For turn-by-turn navigation, the best mobile software hands down is TomTom Navigator. It does cost money, but if you already have the phone and a bluetooth GPS, the software is cheaper than a typical car based unit, and you can also use it walking, cycling, on a motorcycle, etc. I use this software with my Blue Logger and a Palm Centro and it is FANTASTIC! I have a Lowrance car-based GPS that I bought for $200, and this blows it away both for accuracy and ease of use.
If your needs don’t require turn based navigation, but perhaps you’re into geocaching or you are off road, ther are several other free applications worth checking out:
cotoGPS – A GPS program for Palm Powered Devices. It shows all important information and is useful for any Geocaching tours!
Where Am I – A Google Maps Mobile companion tool for Palm OS. If you want to bind your bluetooth GPS receiver with Google Maps, then this tool is for you. This applpication does not enable turn based navigation with Google maps, but it can let you pinpoint your current position for the purpose of getting directions.
Navegador – Navegador is a GPS enabled application that collects real time information and provides an easy and compact navigation solution. It has some very basic mapping features, sort of like the old school handhel Garmins with user defined waypoints and saved locations with customizable icons.
I use cotoGPS and Navegador on my Centro and they work well. Jen’s Treo 650 has a data plan, and Where Am I works on hers and Google Maps.
The bottom line is that for $30.00, this GPS has proven to be one of the coolest gadgets I have ever bought. It accompanies me on all my cycling adventures so that I can make my own route maps, elevation charts, etc. And when combined with my Palm Phone, it makes an incredibly robust mobile navigation solution! If you see one for cheap on eBay or Craigslist, grab it, but even at the full price of $130.00 from DeLorme, its internal logging capabilities make it a solid purchase!