A lot of those stores have back pedaled. HTC's direct preorder (serviced by LetsTalk) was taken down, and orders that were placed before the takedown now show unknown availability. Best Buy also took down their links to their preorder for T-Mobile. At first I thought it was because they sold out already, but the HTC guy I talked to on Friday said that they shouldn't have been preordering in the first place and that the only devices that had sold out at the time were the unlocked and developer versions. I think if you snuck in an order before they stopped taking them, as I did, the order will just stay in the system until an actual shipping date gets chosen.
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