Lost Sundays - a webcomic from the creator of WhineCube's logotype. Be sure to check out the Old School link.
WhineCube's official forum at Emutalk.
Other GameCube emulators
Dextrose v.4 - has a good collection of old homebrew.
Torlus Console Development
devkitpro.org - home of devkitPPC, homebrew GC compiler
Anders Granlund's homepage - home of the GC xRick port
Emulation64 - WhineCube's webhost
debugmo.de - tmbinc's homepage
PDROMs - Public Domain console software
Cleon's Gamecube Demos
gadgeeks.com - gadget news for geeks (in Swedish.)