An anonymous reader writes "Greig 'Theremin Hero' Stewart has developed a way to play Guitar Hero with a theremin, like an air guitar. The results speak for themselves, in this rocking video complete with awesome costumes and some sweet artwork. It even has a Co-op mode. ROCK ON! This needs to be a real product!" The beginning is a bit annoying, but this has to be one of the coolest "projects" I've seen in a long time.