You guys remember the game show Name That Tune don't ya? This idea (or lack thereof) of Name That Riff started after a long night of partying. I'd play something on the guitar and had my friends see who could guess the quickest...
So check it out, its a great way to kill some time. http://dgez.newgrounds.com/audio/
If I could do flash I would have made a more interactive game...but oh well..