We can't begin explain our exasperation at running a Samsung Galaxy Tab on Sprint's 3G, knowing full well the WiMAX airwaves floating just overhead could make our experience speedy. Thankfully, we won't have to dwell on our frustration for long, because a Sprint executive told Forbes that a 4G tablet will arrive in 2011. Sprint's Paget Alves, president of business markets, wouldn't say where it would be made, but hinted that the company intends to sell tablets running different operating systems -- so it's probably not another Android device. What could it be, then? We can't say, but paired with the knowledge that Verizon also plans to
