Anyone seen or played Frets On Fire? think Guitar hero but on Pc using your keyboard as the guitar, quite good tbh,you can also use Guitar hero 2 songs in it (you wil have to google them though).

Frets On Fire

Looks interesting, not sure about no Guitar though!!

But ben the most important key is ESC, use it when you realise you suck

I tried this a year ago, was pretty good fun actually