There are a few other forums online. Just like here, you have to register to use most forums. Here is a list:

BoxingScene
http://www.boxingscene.com/forums/

Boxing Insider
http://boards.boxinginsider.com/

MaxBoxing. Not much training but great for talkin' smack :eek
http://www.maxboxing.com/Forums/

TalkingBoxing. Not much training but interesting posts.
http://lukey33.proboards17.com/index.cgi

General Boxing information
http://boxing.about.com/

RossBoxing.com (Pretty good training info)
http://p201.ezboard.com/brossboxingforum

East side Boxing
http://www.boxingnews24.com/forum/

Hard Core boxing
http://p206.ezboard.com/bhardcoreboxing19143

Our friend across the Pond ( UK )
http://boxing-forum.co.uk/phpBB2/index.php

Defend Forums _ Martial Arts & Boxing ( Scroll down...)
http://www.defend.net/deluxeforums/index.php?

Martial Arts Planet_MA & Boxing ( scroll..)
http://www.martialartsplanet.com/forums/index.php?

Fighting Forums ( martial arts only )
http://www.fightingarts.com/forums/c...i?action=intro

Aardvarksports.net has a boxing forum.
http://www.aardvarksport.net/chat/in...029a2201f11590

Talkabout sports ( Lots of sports...)
http://www.talkaboutsportsnetwork.com/

Manny's Forum ( no training info, but a lot about manny :rolleyes )
http://www.mannypacquiao.ph/forum/

TaeKwondo Lots of subjects but not many posts.
http://www.tkdtutor.com/TKDTutorForu...00411696800c45

General fitness forums. Very Active
http://www.discussfitness.com/index.php?

World Fitness
http://www.worldfitness.com/

Fitness Explosion ( has sports forum ) Needs some life.
http://fitnessexplosion.com/cgi-bin/...=&key=&others=

That ought to keep you busy for a while....

SpeedBag
http://www.speedbagcentral.com/Home.html