Motorola has started rolling out Android 4.0 Ice Cream Sandwich to Xoom tablet owners this week as part of a staggered release. The update is initially only being served up to WiFi devices; those with cellular-enabled tablets remain on the waiting list.

WiFi users should see an update notification on their device the next time they log into a wireless network. If there’s no auto-update notification, owners can check on the status manually by going into Settings -> About tablet -> System updates on the device.

Motorola promises that users who upgrade to ICS can expect an updated browser with faster rendering, zoom and pan, swipe to dismiss notifications, tasks and browser tabs, a redesigned app launcher and a new system font for improved readability. In addition to the new font, widgets are now richer and resizable, allowing you to show more content or shrink them to save space.

An updated “People” app replaces contacts and integrates with Google+ and other social networks, tying all of your contacts into one central location. Tablet users will now also have the ability to "type with their voice" to create emails, SMS or any other text simply by speaking into the microphone.

Motorola began accepting orders for free 4G LTE radio upgrades for 3G tablet owners last September after promising the upgrade shortly after launching the Xoom on February 24. As of writing, Motorola hasn’t announced when ICS will be available for cellular models aside from mentioning that the update will roll out in phases over the course of a few weeks.