Well,
First it just came into my mind because we are now indeed here at SketchUcation.
On the other hand, there used to be (ahm... still is a "How-to" section in the "Old Forums", too, though it was mainly intended to provide some basic knowledge (however some were obviously useful)
I don't know really - especially if the whole community is not interested, there shouldn't be another "useless category" I think. I myself made a few tuts, too (as I also post a lot at the Groups Forum, mostly to help "newbies") so I think tuts can be useful.
I'll think about it and we can get back to this.