Even more so when you consider that the Treo 700p is already a MP3 player, video player, web/email capable, and a smartphone for easy integration with the TomTom Plus features. Throw TomTom Nav 6 at it, and you basically have a GO 910 with (significantly) less storage and a smaller screen as the only caveats. Of course, if you throw a $70 4gb SD card at the 700p, too, your storage problem is significantly lessened, too.
Not a bad deal, but I just recently moved away from using my Palm as a GPS navigation system, and I'm enjoying having a separate cell phone, PDA, and a AIO GPS too much to go back to any form of convergence device.