I like how they are separated, but here is what I noticed:
Some crossposting between JS Programming and Request a JS forums.
Often times posts in either should be in the other.
DOM Scripting is the least popular, and I've moved more threads there than have been posted there.
I consider DOM Scripting and XML my pet forums though

and would hate to see one of them merged, but I can see the reasoning behind it.
What we really need is a generic DHTML forum. And I think we need it badly.
Also, when are you getting around to promoting supermoderators? There have been a few occurrences where if you had promoted me earlier it would have made things easier.