It's not often I would ever do this, but I've just been flicking through this girl's dA profile and HOLY SHIT is it good. All I'm gonna say is, Genderbent Marauders + Snape are really awesome.
http://viria13.deviantart.com/ - check it out for funsies. Despite being a minefield of "oh god, why did that dude post a picture of his junk and put it on dA!?" The front page can lead to awesomeness indeed.