Ok, Lasse Gjertsen has been mentioned already. Now what would happen if someone browsed through all kinds of youtube videos showing people just playing something and remixed them to create whole new original songs?
Someone apparently did just that, and the results are nothing short of breathtaking.

http://thru-you.com/

A whole variety of styles. A funk song, one sounds like something produced by Delerium, one is like Daft Punk, a soul piece, and all that made with random youtube pieces.