As it turns out, pornoshow was the song I found first.
I actually really like Eisenfunk's 8-bit album.
Mind.in.a.box also did a song titled 8-bits on their last album. It's still classic, well produced mind.in.a.box sound and not too much 8-bit sound in itself. I honestly think the song is about classic video games, more than anything. Here's a link to a video they did for the song. http://www.youtube.com/watch?v=GoGpLl-SUfk
It's actually a fun video to watch.
I you really want to get into 8-bit music, look into chiptunes. There's some pretty wild stuff out there.http://www.youtube.com/watch?v=SAnFLgThTgohttp://www.youtube.com/watch?v=gKomJ3otKuw