http://recforums.prosoundweb.com/ is another great site, full of pros AND home recordists. It's probably a good idea to lurk for a while and use the search feature a lot, it can be a little intimidating sometimes...
Then there's
http://womb.mixerman.net/ where I hang out a bit. Lots of good stuff, but it can be an absolute zoo! Be warned!
A place that's got some good info and a fairly friendly forum is
http://audiominds.com/ but it's got a much smaller membership and can be a little clique-ish. I read it occasionally and post infrequently...
Cheers, Tim