Just in case anyone was thinking MSN would come out of their coma, and resurrect the Groups thing,..the Official Message is posted as this:
The MSN Groups service has closed
If you would like to create a new group, we have established a partnership with Multiply - an online group and media sharing service that is tailored to the needs of larger groups. If you would like to create a small group of less than 1000 members, please visit Windows Live Groups.
For further information on the closure of MSN Groups, please access one of the following local blogs: