Sidekick users see their data vanish into a cloud - washingtonpost.com

A server meltdown over the weekend wiped out the master copies of personal data -- including address books, calendars, to-do lists and photos -- accumulated by users of T-Mobile's formerly popular Sidekick smartphone.

This computing calamity allows Sidekick owners only a faint hope of backing up the information currently on their devices, and none of recovering anything they'd trusted to online storage. And it leaves T-Mobile and the operator of the Sidekick's data service, a Microsoft subsidiary formerly known as Danger Inc. -- oh, the irony! -- with serious explaining to do...