Forums

DevMaster.net
Game and graphics programming using OpenGL.
http://www.devmaster.net/forums/forumdisplay.php?f=11

GameDev.Net
Forum dedicated to OpenGL game programming.
http://www.gamedev.net/community/forums/forum.asp?forum_id=25

Hybrid OpenGL ES Forum
Forum for Hybrid's OpenGL ES implementation (Gerbera).
http://forum.hybrid.fi/index.php?board=3.0

iDevGames
The Macintosh OpenGL community forum.
http://www.idevgames.com/forum/forumdisplay.php?f=12

Khronos Group OpenGL ES Forum
For discussion on OpenGL ES development.
http://www.khronos.org/message_boards/?category=3