that there are now numbers you can call when you hear a song and what to know what it is and you hold the phone out for 30 seconds and it can tell you what song it is?!

gone are the days of wracking your brains for days and days trying to think what that song was!
..or calling friends back home at stoopid o'clock in the morning and singing down the phone to them only to be mocked! :-/

does anyone actually know any of these services?