From BlenderWiki

[edit] Forums

Forums and newsgroups are excellent ways for Blender users to submit questions and share their own knowledge with others. A number of Web base Blender forums exist. These include:

• Blender Artists - Hosted by BlenderArtists.org
• Blender Community - Hosted by blender.org
• CGSociety - Hosted by cgsociety.org
• SubdivisionModeling.com - Non blender specific discussions on subdivision modeling.