Here is a neat song using either mixed Atari sounds or a bunch of sounds made to sound like they are from the Atari. Hopefully the former.
And here is an interesting demo of a guy playing SMB with his hand as the controller. Make it to the end where he is controlling like 200 Marios in a wave. It'd be nice to see something like that coming out on the eye-toy for the Playstation. Hand controlled and possibly generated particle systems!