There is a easy to set-up and use forum called Aimoo and they havetoday added a new feature to their system, which will copy all of your content from your MSN Group onto a new Aimoo board FOR FREE!
To copy all of your content over to Aimoo, all you need to do is sign sign-up for a new Aimoo account.
Complete the details in "My Community Info" for what you want your web link and forum name to be.
Make sure you select and then complete the details of your MSN Group. (DON'T WORRY - they wont ask for your MSN password!!).
Then select a category that you want to have your forum in.
DON'T FORGET - to enter the "Verification Code" and select SUBMIT!!
Your new Aimoo forum will then be created straight away and your MSN Group content will then be moved over for you to a specially-created board within your forum within 72 hours.
Further info will be posted in this thread, as we have it.