If you ask me I think there could be some effects out there that have been not been put out as impromptu but with a few small changes could be made that way.

Such as a No. 2 Pencil. Of course it's not as strong this way but you can still make the writing disappear.

That is the only one that comes to mind right off. Anybody else have any?

I agree..but I know nothing about magic, so I can not give any help. (I'm learning though)

I also do a Matrix with 4 borrowed coins and 3 borrowed biz cards (and the 4th one being my own). Other then that all you need is good table/mat to do this on.