Whats that song?

I like to let my WorldSpace play on in the backround while I read, surf or wahtever. But sometimes a song catches my fancy and I have no way of knowing who the artist is. Today I found a site Tunatic, it claims I can play the music thru a mic and it will give me the information. Its free. This will be fun to try out and if it works I will expand my music listening and contract my wallet.