It's a rather odd piece of technology that can't really be put into words - it's much better explained by a video demonstration. Here we go:
You may think this technology uses speech recognition, but that's actually not the case. It makes use of pattern recognition; instead of converting spoken word to text and comparing that text to previously recorded notes to find a match, Recite looks at patterns in your speech and finds the correct match this way.
It's in technology preview right now, meaning it's far from stable. You ned to have one of the following phones: AT&T BlackJack II, AT&T Pantech Duo, HTC Diamond, Motorola Q9C, Moto Q9m, Palm Treo 800w, Palm Treo Pro, SMT 5800, T-Mobile Dash, T-Mobile Shadow, or the T-Mobile Wing. Get it here.