Hi Tyler -
I'm a 3DS Max user, and I use area.autodesk.com all the time, however I don't see an AutoCAD section. I think that forum is for the entertainment oriented software.
However, there is a large, active, discussion forum on AutoCAD on the Autodesk website:
http://forums.autodesk.com/t5/AutoCAD/ct-p/8
Bentley also has a discussion forum which looks to be pretty active:
http://communities.bentley.com/f/
Joe Bourke
Owner/Creative Director
Bourke Media
http://www.bourkemedia.com