Verizon just revealed they will be taking pre-orders for the Samsung Galaxy Tab 10.1 4G LTE Version Android Tablet on June 8th. No final release date was given, but considering the WiFi version is hitting store shelves on June 17th, that date is a safe bet. The tablet will come in a metallic gray or glossy white version. Furthermore, it will have two storage sizes: either a 16GB or 32GB model and cost $529 or $629 respectively on-contract. Of course it is a 4G LTE model and will run that way out of the box, (unlike the initial Xoom).
It will also launch with Android 3.1 and several accessories like a keyboard dock and multi-media station. The advanced TouchWIZ UI won't come with the initial launch, but is scheduled to come in a later OTA, (it probably has something to do with the Apple/Samsung lawsuit).
Source: GalaxyTabForums.net via Droid-Life