Motorola's been a bit cagey about its whole "project" for the Motorola Xoom, but it may finally be time to roll back the curtain to reveal, get this, a big ole pile of Ice Cream Sandwich. According to Engadget tipsters, the update has begun rolling out the mobile OS to a select group of Xoom owners -- both the WiFi and 4G LTE varieties. It seems like the roll out begins tonight and continues over the weekend, bringing Android 4.0 to the star of CES 2011.