I've followed this guy on youtube for a while, and he's got some pretty interesting raps/rhymes and overall ideas about stuff. He's also Autistic and wrote a song about it, because that's how he is able to convey his emotions and thoughts.
Thought it was interesting, and wanted to share - http://www.youtube.com/watch?v=Yng0V0TCl9s. His channel can be found here (http://www.youtube.com/user/douglby), where he raps about a lot of other things.