Does anyone use a device like the Handspring Visor or another Palm-based PDA with a GPS attachment to seek caches, download waypoints, track finds, follow TBs, etc? Also, any applications that can record log data in the field and upload to GeoCaching.com? I use a HandyGPS with my Handspring Visor and love it, but so far, I haven't found any other applications that do everything else on my one PDA.