The lead paragraph from this Washington Post article says it all:
"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."
It's a little out of our element, but I touched briefly on the risks of cloud computing back in April. Well, T-Mobile users are getting a front-row seat to what happens when those entrusted with your data don't endeavor to properly protect it. And this isn't just any old vendor – this is Microsoft subsidiary Danger, Inc.
There isn't really much to add, except that had this happened to one of my clients under my watch, I would have been fired!