First I pointed you to an unofficial update tool to get the Windows Phone 7 updates on your AT&T handsets early.

Then, this update was posted on update tool developer Chris Walsh's site:

tl;dr: Do not use my tool to update your phone.

[...]

Most problematic, Microsoft tells me that updating in this manner will place devices in a "non-serviceable state". In its blog post describing the situation, Microsoft instead says devices updated in this manner "may" no longer receive updates.

Horror. Sadness. Until just now:

[blackbirdpie url="http://twitter.com/#!/edbott/status/60405885205356545"]

Yay.