Before you get excited:
this isn’t exactly what you read in the heading. There is no Android running on any iPod (@ the moment !)

What you will see is actually a slideshow to give an impression of how the Android-OS might look on a multi-touch device. Touch owner cast42 put some screenshots of the Android-OS to his touch, what gives a fair idea of how the platform could look on a device of a similar form-factor to the iPhone.

http://castfortwo.blogspot.com/2007/11/impression-of-googles-android-ui-on.html

First impressions: