I recently covered Surf Wax America and made it into a Chiptune song! It seems to have done pretty well on my soundcloud and I was messaged by a listener to post it here. You can find the song here:
http://soundcloud.com/kipjaw/surf-wax-america-8-bit-cover-1. There's a free download if you like as well.
Also, I'm not sure if you guys have listened to this before or not, but these are some more incredible Weezer covers in 8-bit! http://www.ptesquad.com/more/pte018.html