One of our customers dropped us a line to let us know:
Just to let you know that Amazon is dumping Garmin Streetpilot c320, 330, 340, and some other units as well. I am talking $700 off here. New models must be coming out soon.
Thanks Steve! Just a quick note that Garmin USB support is currently in late-alpha, e-mail us if you want to be on the beta list.