Good places to get started with PSP Wifi?

Hi guys.

Say you wanted to start developing some demo's using wifi and multiple psp's, over lan and across the internet. What places would I start going to figure out how to program once we are talking about client server applications, more specifically real time, and for games. I have checked out some other forums i frequent, and saw the demo in the psp toolchain sdk, and tried locating the SMS emulator source (supports 2 players) - however turned up unlucky, but I'm still looking for more resources and I would appreciate help getting the ball rolling. Is there additional packages I should checkout of the ps2dev.org svn that have more documentation or samples for using the PSP wlan features?

Preferrably C please, and not LUA.