Looks like the rumors about Microsoft's Skybox service--called My Phone in actuality--are true. Matthew Miller has a nice write-up about what happened today (I got to the site too late, and it had been already turned off):

It doesn’t appear that you can sign up or use it yet, but you can click the more info link [it's not working now --Paul] to find out several more details about the beta service that looks like it will launch around Mobile World Congress in less than 2 weeks.

The Microsoft My Phone site states the following:

Microsoft My Phone syncs information between your mobile phone and the web, enabling you to:

  • Back up and restore your phone’s information to a password-protected web site
  • Access and update your contacts and appointments through your web account
  • Share photos on your phone with family and friends

The site to download the client to your Windows Mobile 6 phone is www.getskybox.com/install, but as you will find it is not yet live. The beta will be free and you will get 200 MB of free storage. If you have an Exchange server setup with your WM device, then My Phone will not synchronize your contacts, calendar, or tasks. It will be able to sync up your photos and share them with family and friends.