Under the Bridge

This looks like an excellent tutorial on implementing Bonjour-based networking in your iPhone application, and of course there’s source code provided. Yes, most direct applications of this will probably be more appropriately addressed with GameKit.framework in OS 3.0 — but it certainly can’t hurt to supplement Bluetooth local networking with WiFi local networking … or, of course, offer both! Also note that the author offers ByteClub, a paid multiplayer gaming platform.

And in order to do that, an excellent place to look is MYNetwork the Mooseyard Networking Library from the redoubtable Jens Alfke … who has his own commentary on the above tutorial, and has even forked the above source to use MYNetwork. For any networking needs past GameKit only, that’s definitely where we’d start!

[UPDATE: And speaking of GameKit ... there's a pre-WWDC release of a contact sharing application and full source code here!]