I found a very cool site designed to test your knowledge of songs from different bands and genres - it's a bit like the Guess that song game but with audio samples of songs. You have a sample of a song and 4 choices. Most of our own fave bands should be covered I'd say (you get a random band/artist to start off with), so check it out here and have some fun 
http://www.chthonicionic.net/whatsthatsong/
http://www.chthonicionic.net/whatsthatsong/