Many users have been reporting that they lost their data from their Sidekick phones this weekend. Some of the losses include contacts and calendar entries. Microsoft subsidiary Danger has now confirmed the worst for Sidekick users, they won't be getting their data back. A massive server failure has resulted in all data stored on those servers being lost. Apparently there wasn't a good backup solution in place. Any data that wasn't stored locally on the users own phone has been lost. Microsoft has announced that it is continuing to work around the clock to try to find a way to recover the data.