Leap of faith: I used a "real" USB cable, and Active Sync connects to the GPS unit.
In VS 2008, with Active Sync connection, it is telling me there isn't enough space:
"Error 1 Deployment and/or registration failed with error: 0x8973190e. Error writing file '\Windows\NETCFV2.wce5.armv4i.cab'. Error 0x80070070: There is not enough space on the disk. Device Connectivity Component "
Next, I ran Explorer on the GPS unit and Using System Properties, changed "Memory" - Storage Memory to a higher value (set the pointer to about 50%). Now the EvDashboard.exe deploys and runs in the debugger.
Hopefully this will help others with similar problems.