Oh, and definitely get a BT GPSr, rather than a plug-in SDIO GPSr for the Palm. With a plugin, the Palm really likes to be positioned for a good view of the sky, which conflicts with having a good view of the display for the driver.

With separate units over BT, both desires are easily met.

The Holix 231 has BT and serial built-in, and a $20 serial-to-USB cable is an option -- but don't plan on actually using the serial, since the firmware folks goofed: the unit powers off after 10minutes without a BT connection, regardless of whether the serial is in use or not! Great for BT, though, and it uses a replaceable LIon cellphone battery (Nokia 7xxx series) when not plugged into the (included) lighter adaptor. The Xtrac firmware is awe inspiring.. nearly instant fixes under all conditions -- way better than my dedicated Magellan GPSr that I use for cache finding.

Other modern BT GPSr units are likely every bit as good, and the new chipsets now appearing mean they're getting a lot better for next year's units!

Cheers