Here is a tutorial on sprites http://wiki.superfamicom.org/snes/show/How+to+display+sprites and one on how to get around DMA limitations http://wiki.superfamicom.org/snes/show/Using+DMA+effectively.

Great to see new content added to that site! Thanks!

I've elaborated a little more on the sprites tutorial, since I pretty much rushed that one to get it finished. I hope that the idea of "extending" the OAM by an additional 512 bytes and compressing it down into 32 bytes of hi-OAM, isn't confusing to anyone. I really have no clue why Nintendo chose such a bizarre OAM set up.