In efforts to knock Apple off its high horse Samsung is preparing a full line-up of tablet devices that will first be introduced in South Korea sometime in late Q3 to early Q4, ideally before the iPad launches there to get a head start.
Samsung calls these the Galaxy Tab line and there will be 7-, 8- and 10-inch tablets coming. All of these tablets will run Android and have a TouchWiz user interface. it's expected they'll all sport 3G connectivity as well as WiFi and SK Telecom whom is South Korea's biggest mobile service provider is looking to sell them in big, big numbers thanks to aggressive pricing.
Specifics as to the internals of these units and what sort of hardware processing power Samsung is including in the Galaxy Tab line is not yet known, but it's assumed at this stage and will remain likely that it will be ARM-based.