I just purchased the GlobalSat BT328 SiRF Bluetooth GPS receiver and am able to use it with a downloaded version of Earthcomber for basic map and navigation.  Are there other programs available for purchase or sharware/freeware that might work better, particularly one that has voice prompts?

Thanks!

Pls consider Emtac Navigator 4 here:

http://www.buygpsnow.com/emtac-navigator-4-0-v4-for-palm-os-map-data-pre-loaded-on-memory-card-862.aspx