Yes we downloaded the 2.1 for our orig Apple iPod touch.
Here is what has changed
Improved battery life.
Really Faster when downloading and installing Apps
Much faster back up. Although it only back ups settings and your spot
in games and is not a big deal if the apps are already on your computer.
Contacts alot faster
When in mail and hit the plus button contacts does not freeze or lag
Better WiFi signal
App store no longer freezes or lags
And if there is more we will let u know!
Sent from my iPod