Milking this one for all it's worth, eh Samsung? In what's easily becoming the most drawn-out product launch in the history of product launches, Sammy is just now informing us of a fifth American carrier onboard to carry its Galaxy Tab: US Cellular. The regional CDMA operator has been chosen as the token 'little guy' to offer the 7-inch, Froyo-based tablet, but the company's not saying when it will be arriving nor for how much. We're guessing it'll cost between $400 and $600 depending on the contract situation, but considering that every other carrier is