Bill, I agree. Too many could get annoying. This is the only BB I go to because it is simple.
But then you ask a good question:
How many is too many?
I don't think you are close to too many yet. I personally couldn't put a number on it, but I'd know it when I saw it.
If a "business" forum were to appear I know I'd use it.
I don't know if internet speed makes a difference (because I'm cable modem) with the jumping in and out of forums.
One last thing about too many forums. It might make more of a difference to a new comer getting confused as to where to go. I browse here enough I won't get lost.