Motorola has just updated their Facebook page with long awaited information regarding the Wifi and 3G versions of the Motorola Xoom, they have advised that an update has been submitted to carriers for testing and if no issues are found it could roll out to users on June 21st. This is a change to the schedule released nearly a fortnight ago which listed the update for the Xoom Wifi + 3G as merely at the Evaluation & Planning stage.

We have an update for all of our Xoom fans. We have now submitted our final round of software to our carrier partners for testing. It will take two weeks for them to test. Provided there are no issues found during the testing, we expect to upgrade Motorola Xoom to Ice Cream Sandwich for both WiFi and 3G users on June 21st. Thanks

So it took only 2 weeks to go from Evaluation and Planning which is stage 1 through Development and is now in Testing? Still if it means an update is coming to Xoom owners sooner I suppose that is a good thing, unfortunately there is no reason given as to why WiFi only owners have to wait for carrier approval on the update.