This is just to cool, If you don't know Splam! is a GBA C64 Emulator thats in the works. As a teaser I guess a beta of the sid emulator was released with 1meg of cool Sid tunes ready to flash onto your development cart.

Note that though it works emulated with Visualboy advance it doesn't sound right at all emulated.

Get it at http://splam.emuhq.com/