The Microsoft My Phone service was only available in invitation-only beta testing before, but now the service is available to everyone using a Windows Mobile device. The My Phone service will allow WinMo users to manage and back-up files and personal information on the password-protected service.
Some of the information that can be backed up includes photos, videos, contacts, appointments, text messages, etc. If you are a WinMo user and try it out, let us know what you think of the service in the comments.
The service is available at: http://myphone.microsoft.com/.