There is a Samsung event being held in New York tonight and according to Android Central they announced that the Galaxy Tab would be coming to all four major US wireless carriers, with a WiFi-only version to follow. The official announcement was made along with news that their Samsung Media Hub service is launching on Galaxy S devices soon.
They stated that the Galaxy Tab would be available on Verizon, Sprint, AT&T, and T-Mobile in time for people to buy them for the holidays. In typical fashion when a carrier is involved, there was no pricing, fees, or definitive dates given for the release. While I am sure the device will perform quite well and have slick hardware, I haven't seen anything in Android 2.2 that leads me to believe the experience will be much different than what I already see on my 4.3 inch Android 2.2 device. I am not sure the current version of Android scales up to a large display so easily without specific utilities and applications designed for larger displays.
Android Central is at the event so I will follow their hands-on coverage and news about the Samsung Media Hub launch.