There's a keyboard forum
at Pro Sound Web that could use a little more traffic. We tend to use rather strong language from time to time like darn and heck, but if you're not offended by that kind of thing feel free to join in...
...and be very wary of asking dumb questions; they do believe there is such a thing.
The
Keyboard Corner at Musicplayer.com is moving over to Harmony Central in a couple of weeks, but I understand that there will still be a forum for keyboard players at that site.