Team Xecutor
XboxScene
AllXboxSkins.com
xbox-skins.net
EvolutionX
SharePoints application for setting up SMB shares on your network
Article about sharing without using SharePoints (symbolic links)
Help on setting up Sharepoints and editing the xml file
Panic's brilliant Transmit FTP application
Jiggler to stop your Mac sleeping when streaming
Some emulators to try out (with ROMs of games you own of course)
A clever chap called 'Furbs' provided lots of information on XBMC
Avalaunch Dashboard
WikiPedia's XBMC page
Some info on setting up iTunes streaming
Another site dealing with XBMC and the Mac
And if you're bored...
Slackerpedia.com
The British Lard Marketing Board
Apple Computer