Midomi.com - Voice based music search

I came across this website www.midomi.com which allows you to search for a song by using your voice. You dont need to know the lyrics. Just the tune.
Sing with made up words or just hum and Midomi search engine matches your recording and comes up remarkably accurate results. One does not have to be a great singer also to get a successful match.
Once you find a match you can hear how Midomi matched your voice by checking matched entries. You can purchase the track right there.
Pretty cool idea. I guess this would be a candidate for Google or Apple to buy out if it becomes successful.