I have the 16GB iPod Touch and I purchased the original update which included the Mail apps etc.
I am selling my iPod to a friend as I got the iPhone and I pressed the "RESET" button in the iPod settings menu.
It never mentioned it would delete the software.
I was mistaken and now I am back to the old software with no idea how to get it back.
I have plugged the iPod into iTunes and it asked if I wanted to restore the settings, which I did and it Brought back my Web Apps on the home screen but there is no mail apps or any of the new software upgrade features.
The first time I restored I saw the message about how to change around the home screen by holding down a icon until it wiggles - which is only avaliable in the Jan update not the original software - but that only flashed on the screen for a second and now the software is back to the old one.
Sorry for the essay but any ideas or help??