AT&T and Samsung have just announced that they’ll start offering the Galaxy Tab slate from Sunday, Nov. 21 with pay-as-you-go monthly data plans. The product will cost $649.99 and it’ll be available in over 2,200 AT&T locations and online over here. You get two pay-as-you-go data plan options for the device: a $14.99 one for 30 days with 250MB usage and a $25 pay-as-you-go plan for 30 days with up to 2GB usage.

If you use up all the data in your plan before the 30 days time frame, you can acquire a new plan of the same kind. Plans renew every 30 days and you can pay for them with credit or debit cards. Through AT&T’s service you get access to the entire national WiFi network free of charge. You can activate the service plan directly on the Galaxy Tab, without a phone call or visit to the store.

Why buy a Galaxy Tab? Android 2.2, 7 inch TFT touchscreen, 1GHz CPPU, and a large library of content.