Besides the retina display and facetime is there anything that the 4th gen does that the 3rd gen can't handle. Found a 3rd gen with 32gb for $130 and thinking about getting it.
Yes, the new iPod touch has a dedicated speaker port next to the dock connecter, rather than emitting sound from the headphone jack/dock connecter as in the previous generations. As for the gyroscope, it's exclusive to the 4th gen, the previous generations only had an accelerometer. Not many games are optimized to take advantage of the gyro, but a few popular games such as Real Racing and N.O.V.A offer gyroscope support.
Who gave me -2? seriously, did my post deserve that? It's only truth!