Once in a while Weird Al manages to hit the ball out of the park....

I like the work Rx does. More to be found at The Party Party (click on the "listen here" link, which will take you to a page where you can download audio files. "White Lines" is one of the newest.)

Battlestar Simpsons - the BSG cast depicted inna Simpsons stylee.

And then at the end of House Of M Wanda yells --

Wait, Northstar, what are...?

PassFail Studios does it again....

Harry Potter And The Half-Blood Poet.  Which is likely to have T. S. Eliot purists and lovers of "The Waste Land" moaning, whimpering and tearing their hair out.