Advertising a product before it's even official, what could be more patriotic? TmoNews has a convincing (but still unconfirmed) picture of a T-Mobile "Back to School" poster featuring Samsung :), Gravity T, Gravity 3, and Motorola Charm? Looks like our chubby, Motoblur-equipped candybar has been given an air of legitimacy, even more than the previous leak. What's also interesting is the price -- as part of the promotion, Charm is apparently free