There are a number of questions coming from enterprise customers wanting to support Windows Phone 7, and are particularly interested in the security features to be able to wipe a device if is gets lost or stolen.

Here is a great screencast on http://edge.technet.com from the UK team which walks you through the process of wiping a Windows Phone 7 remotely through BPOS, Exchange Online , Exchange or Outlook web access  and then going through the process of setting it up again.

http://technet.microsoft.com/en-us/edge/windows_phone_7_remote_wipe_using_bpos.aspx?query=1