Well, I say 'all' but Microsoft's Mobile Me beater requires users to have a Windows Mobile 6.x smartphone at present even if it should become available to all platforms in time. So, what do we get?
Like MM, My Phone is a Cloud based wireless synchronisation service which allows for contacts, calendar entries, text messages, photos and even some video to be automatically stored online in a password protected account. The theory is should anything happen to your phone be it stolen/lost/drowned after you dived/jumped fully clothed into the fountain/swimming pool like a muppet that the data will be safe. One caveat: My Phone is not currently compatible with handsets actively connected to Exchange - amusing yes.
You can trial My Phone now simply by going to http://myphone.microsoft.com/install in your Windows Mobile phone's browser and you'll be on your way. Cloud storage is currently limited to 200MB per user though larger options will be available by launch towards the end of the year.
The start of better things for Microsoft in the smartphone world? Let's hope so...