I have to agree with SilentNEKO, there just isn't much activity here. I certainly can't fault the job you've done, as you seem to be everywhere and taking care of everything. I may be way off base here, but in my opinion there are just way too many categories for anyone to keep up with. It's like having a television with 200 channels. You're going to miss just about everything. Now one wants only three or four channels, but if there are too many you just can't help but focus your attention on a only a few. The result is very little activity everywhere. Itís just a matter of arithmetic.
I would consider consolidating somehow. If this was done, I'm sure some would complain, but I think the overall result would be far better website. I've noticed people asking you to create even more categories as though this would somehow help things. It won't. When more people participate in fewer areas, thereís automatically going to be more activity in each area. Just my 2 cents.