Not sure if all you developers have seen this...
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2018&mcparam=en535021
This is basically a USB host IC. From what I see, one can use this IC
and connect a USB GPS to the RS232 on a TNC device (radio, etc.) without
the need of a PC.
Derek Koonce
KE6JTP