PB Nation
Online paintball forums with movies and other paintball related topics.
http://www.pbnation.com/

The Walkon Zone
Tournament calendar, chat forum, tech area, links, and information.
http://www.walkonzone.com/

Paintball Genius
Includes paintball talk, gear, and news.
http://sniperman.conforums2.com/

PaintballForum.com
Offers general discussions and sections about specific guns and gear reviews.
http://www.paintballforum.com/

Paintball Forums
Tips, tricks, and strategies.
http://www.paintballforum.ca/

New Mexico Paintball
Message board also offering local news and photos.
http://www.newmexicopaintball.com/

Paintball Australia Network
Message board focusing on the sport in Australia.
http://www.paintballaustralia.net/content/

Paintball-Forums.com
Paintball community boards.
http://www.paintball-forums.com/