Holux BT-Q1000 GPS Receiver

Was looking for a Bluetooth GPS data logger, and this seemed to fit the bill. It connects happily to my Sony Ericsson K800i over Bluetooth, allowing GPS tracking on the phone, as well as logging GPS data to internal memory for PC upload.

The supplied software is adequate, but the internet furnished me with the outstanding (and free) BT747 software, which allows even more configuration of the device -- you're able to choose whether the device records HDOP, VDOP, as well as speed, elevation, lat and long, waypoints, etc. You can also configure the data collection rate, distance and/or speed triggers.

GPS accuracy seems good, with the reported number of satellites usually greater than my Garmin Etrex Venture Cx. I'm now using both of these in tandem, for OpenStreetMap mapping.