Yeah, AT&T Wireless' new song ID service (which lets you figure out who wrote a song just by dialing a number on your cellphone and holding the phone near the source of the music for 15 seconds) is great if you can actually hear the song in question. But what if you've just got some song stuck in your head, what then? You could try humming the song and seeing if that works, but while we have an unwavering faith in the power of technology, we're guessing this probably won't fly. Well, Toshiba says they're working on something close — a way that you could figure out the name of that song that's driving you mad just by tapping out the rhythm. They say it's already 99% accurate, but it'll still be a little while before you'll be able to name that tune by tapping it out on your cellie.