An interesting announcement from LinkedIn:
There are now over 300,000 groups on LinkedIn where professionals are discussing, sharing news and collaborating with each other. We sincerely appreciate your dedication to the LinkedIn group you manage. Your efforts are essential to the continued success of groups. We’re happy to announce that later this week we are launching a long-requested feature for group managers: the ability to create subgroups. Subgroups are like a break-out session at a conference. They enable you to create more focused areas than in the main group.
Also, by creating and inviting members into subgroups, you can now send additional weekly Announcement emails to focused audiences
I can see this being a really popular addition, and would like to see sub-groups added to both Lotus Connections and LotusLive Engage.