Google
http://www.google.com/
DragonMinded.com
http://www.dragonminded.com/
YoungMX Forums
http://www.youngmx.com/forums/
GBADev Forums
http://forum.gbadev.org/
Drunken Coders
http://www.drunkencoders.com/
NDS-Toolz
http://www.nds-toolz.de/wbb3/
H4ndy's Homebrew Site
http://saso-labs.com/ds/