I know there are still many Commodore 64 fans out there, and one of them is Toni Westbrook; a guy that work on a project called Shredz64, that aim to create connectivity and interaction between Guitar Hero controller with C64. The project plans also include the game itself that runs on C64 using the retro 8-bit beep and blips to output the sound. So far Toni has gotten the controller to work with the C64 and the game development itself has been started earlier this year. Way to go Toni!
Guitar Hero For The Commodore 64 [via kotaku]