VisorCentral.com (http://discussion.visorcentral.com/vcforum/index.php)
- Springboard Modules (http://discussion.visorcentral.com/vcforum/forumdisplay.php?forumid=10)
-- Simple but required module. (http://discussion.visorcentral.com/vcforum/showthread.php?threadid=15306)

How about a module that gives you an RS232 connector and a low speed USB connector? Most people have a mobile phone which provides one or another connector, some have external modems. I know that the docking station and some keyboards provide usb ports, but all I want is a single cable from my mobile phone into a module and be able to surf the net from my Handspring...

I've wanted the same thing for a long time. See this thread.