Yes, but with the caveat that you're doing this of your own volition and against our advice.

 

Go here:  http://multiply.com/msngroupimport

 

Provide your MSN group manager email address and passport and you will be presented with a drop down menu of all of the groups you manage.  Click on the one you want to migrate, select it and click Ok (or migrate...can't remember).  You will either get a migration successful message or a message that your group has been placed in the queue and you'll get an email when the transition is complete.  Some people have had a huge list appear of message group posts and problems with albums, so good luck.

 

Again, to anyone else who may be reading this, CF is not recommending migrating at this time.  Microsoft's project manager has stated that multiply.com is not ready yet for the migration process so if things screw up during the transition, that's on you.