Here is the update in case you are to impatient to wait for the ota. Thanks to droid life for the info.
How to: Manually Update Motorola XOOM to HRI66 (Android 3.0.1) - Droid Life: A Droid Community Blog
How to: Manually Update Motorola XOOM to HRI66 (Android 3.0.1) - Droid Life: A Droid Community Blog