The only thing you can blame T-Mobile for is putting all their eggs in the cloud basket and letting Danger/Microsoft keep all the device data. They’re making up for it by allowing users to cancel their contracts without penalty – a ballsy move – and also offering discounts for people who feel like moving to a G1 – a smart move.
Meanwhile, it’s not enough that Windows Mobile 6.5 is basically Windows Moble 6.1 with extra Shinola applied – Microsoft just basically killed every Sidekick phone in America. How is it even possible to not have a backup of that kind of thing? Anyway, the old rules of DC are still true: don’t trust anything to a Microsoft product that you couldn’t live with being destroyed without notice. Anybody who would rely on a cloud product from Microsoft at this point may have a legitimate mental defect.