The biggest one of seen around is http://www.hockeyforums.com/. It has every team as a forum, and their farm team as a sub-forum, plus general chat, trade rumours, and such and so forth. Check it out if you like.
Yeah I checked that one out before, however it doesn't look like there is much activity on that board. Even the Red Wings forum looks fairly abandoned.
I'm not sure if those websites have actual forums, you know, like this one. I have searched google and I haven't been able to find a good hockey forum yet. I was thinking ESPN would have something, however I haven't seen it yet.
I haven't seen a better site for NHL rumours and confirmed signings. And the guy also has a Habs fan named "Sergio" who sends him rumour information...is that you Sergio?
Just finished watching Steve Young's Hall of Fame induction sppech. God, I'm all choked up.