Not sure, haven't counted them, probably more than 40. But on most I'm alone, some don't have even a single edit from other users, so I take it very slow on such wikis. Especially when there is no interest from visitors either. Well some are also about dead subjects that haven't seen a new translated chapter since quite some time (well that is also why there are no visitors or editors XD).
About the last one, well I'm Fujita's fan, so I can't really miss his new work XD
I can relate on the wikis where it's just you by yourself (I run 1-2 like that at the moment). But still, I'm only an admin on 6 wikis now, not even close to your amount... one day, I'll have set-up a respectable amount of wikis too, but probably nowhere near the amount you've generated :O
Fujita eh ? Never heard of him... but it's to be expected, there are a hell of a lot of manga series' out there ! Oh yes, that's a point ! Your user avatar, who is it of ??