From the time Android 4.0 (Ice Cream Sandwich) was announced, developers have been itching to mod the new code to work with their own devices. It seems a stable version is now available on the Motorola XOOM. This is currently only for the WiFi version, but some claim to have it working on their 3G/4G versions.
There are plenty of screenshots available from razorbladex401, the XDA developer behind the entire project. When making such an upgrade, it would be foolish to forget about making a android backup. The ROM seems stable, but there will undoubtedly be a few kinks that will need to be worked out.
There's a particularly great feeling of updating to the latest version of Android's OS. It may be because it upgrades so quickly, but mostly because you know you're one of the few to take advantage of all the new features. I'm not sure if Google Wallet is still offering a free $10 for signing up on an Android 4.0 (Ice Cream Sandwich) device, but those of you taking the plunge to ICS on your own XOOM should definitely let us know.