Well, this is genuinely awesome: it seems AT&T is pulling back from its ban on third-party sideloaded apps on its Android devices, because HTC has just released an Aria update that enables them (either that or HTC just went rogue here, but we highly doubt it). While that doesn't have much practical implication for your typical smartphone user, it's a strong sign that AT&T might be ready to take a more reasonable stance on the openness of its branded devices that would put it inline with the attitudes Sprint, Verizon, and T-Mobile have all taken with their Android