With any data outage (or technology problem, for that matter) that was as severe as the Sidekick/T-Mobile/Microsoft snafu was, I knew it would only be a matter of time before the class-action lawsuits came to life. Sure enough, two cases have officially entered the system: one in California and one in Washington. The interesting thing here is that they're going after T-Mobile and not Microsoft, the company that operates the servers in question. In both cases, the users claim that T-Mobile misled customers into thinking that the Sidekick platform was secure. As a result, the users suffered a "complete and catastrophic loss of all data" when the systems went down.
With Microsoft and T-Mobile now claiming that most data is able to be restored (and should return to the device in the coming days), I'm curious as to whether the class-action lawsuits will hold ground. Despite that, I have full faith in the American legal system, and I'm sure that someone will come up with a way to successfully sue them at some point.