Whoa, this is kind of out of the blue: on top of the Vibrant 4G that we've already had leaked ad nauseam (though he refers to it as a "Galaxy S 4G"), T-Mobile USA CEO Phiipp Humm mentioned at an event this morning that the company is preparing an HSPA+ Sidekick -- yes, a Sidekick -- albeit with Android slotted in place of the defunct Danger Hiptop operating system. For the record, T-Mobile hasn't had any Sidekicks in its lineup since the middle of last ye
