This isn't that relevant to this post, but kinda. I was messing with karaoke revolution, and I decided to to splice a headset piece with a guitar jack. ground to ground . hot to the microphone hot. Anyways, this lets me play karaoke revolution with my guitar. Quite hard though unless you have a good ear. But I think it's quite fun and would love a homebrew version of karaoke revolution
... but this frets on fire thing looks more like a ddr kinda thing. Not sure if anyone will find this relevant, but i've never seen anyone do this. It really is very fun, but like I said, its hard to hear the notes of the singer voice. I'm not that musically gifted though.
If game company could sell a piece like that I've mentioned, just think. They could make a game to teach you how to play scales, riffs, lead, whatever, and it could tell you what your doing wrong. That would rock, but i digress