Help Me Decorate my Walls

[webmonarch]

So, I just moved in to a new place in DC, and I finally live by myself. Problem is, the whole place is a big white wall. What are some cool ways to decorate walls that are pretty fun and not too expensive? I'm not opposed to posters and the like, but I'd like to do something a little bit different . . .

I don't want anything "dirty" like a whole wall full of naked chick picks, but beyond that I'm pretty much down for anything.

I KNOW the OOT has some hot ideas on this . . .