Yes.

I'm thinking of writing a tutorial not only for collision, but for making a 2d platforms game. If I manage to finish the game (or if I get a good Beta version), I'll try to write about how I implemented the engine, what features it has, how I manage movements, timers, colisions, paralax scrolling, sounds and level desings.
As I'm very busy, I don't think I could wirte a very detailed tutorial, but I'll try to do something useful.

Anyway, I still have several problems, and need the help of people like Crisp_N_Dry.