I have to say I have learned as much or more from the local homebrew club as I have from this forum. Being able to actually TRY dozens of examples of different styles of beer (I think I have sampled a homebrew of every style in the BJCP now, including Lambic) is very educational, and the brew get-togethers where you see other peoples' equipment gives you ideas for improving your own brewhouse. Not to mention the feedback you can get on your beers and all the fun you have too.
And the parties with 25 kegs... OMG!!
Chris Colby, editor of BYO, is a member of our local brew club the Austin Zealots and Marc who is a contributor used to be a Zealots member before he moved to Oregon. Our mailing list has about 280 members subscribed.