As befits a social software solution - the group is known as 'Social Connections'. See their website here: http://socialconnections.info/events/sc.nsf/home.xsp
Social Connections - the IBM Connections User Group
Steve Cogan 2700000Q3G firstname.lastname@example.org Tags:  london user-group social uk connections ibm social-business 990 Visits
I currently tend to Tweet more often as @stevecogan - but interrupting that stream of micro-blogging to point you to a new user group, focusing on IBM Connections.