Eventually this 8-bit thing is going to be just as played out as steampunk. BUT! In the meantime: Someone has put together this fantastic NES-style arrangement of the final track from Dr. Horrible’s Sing-Along-Blog, Everything You Ever.
The arranger, on the original post, mentions that he’s actually done the entire thing and plans to release it en masse complete with sprites of the major characters doing their thing. I look forward to it!