There was an outage earlier in the month of T-Mobile’s Sidekick service. Customers were previously told to back up their data before the outage, and it would be secure. Since the outage, some (but not all) customers have been able to restore their data.
I guess there’s two lessons to be learned here. If you’re providing a service and you’re telling your customers to back up data on your system, then you had better have a good backup and recovery system in place. On the other hand, if you’re a consumer of these services, then maybe it’s a good idea to backup your own data as well.