Another kool site this is.
Midomi allows people to search for a song by singing, humming or whistling a bit of the tune. The site then offers search results that include commercially recorded tracks or versions of the song recorded by others who have used the site.
The technology also lets people listen to the exact section of each of the results that matched their voice sample.
People also can type in a song title or artist to get results. The system recognizes misspelled words.