For anyone in or near Boston, MA, I just started a new MS Meetup Group. Unlike other "support groups" in the area, this is NOT run by the NMSS or any other organization, but rather by and for people with MS.
The idea is to get together at least once a month for a low-key activity (like dinner out, a movie, etc.) and spend time with other people living with MS.
Those interested should visit: http://www.meetup.com/Multiple-Sclerosis/
and join the group for more information.