The followings are 2 forums I visit occasionally:
Electronics Forum for electroni fans:
**broken link removed**
Aoron Homepage:
http://www.aaroncake.net/forum/
(This site has shocking color schemes, red text on blue background!!!)
Other than those: I also subscribe to the following newsgroups:
alt.electronics, aus.electronics, sci.electronics, sci.electronics.design, sci.electronics.basic, sci.electronics.misc
Just be forewarned aus.electonics is frequented by a few stroppy, grumpy and absolutely arrogant but knowledgeable old b***ards who stand no fools. You just have to be well prepared with your questions before you post.
I like this forum the best by far. Some of you guys are very patient and helpful. Keep up the good work.