Yesterday Facebook launched an upgrade to the Facebook Group functionality, the details of the new features are available here. I think the more interesting thing is what is missing, the mainly one being the ability for groups to choose their own relationship and communication style. There is still no good way to maintain a group communication system that scales.
Facebook Groups continue to degrade as users join them and the group owners essentially loose the ability to communicate with the group. This is an excellent idea to control Facebook Group spam but it doesn’t allow users to engagement in popular groups and ideas that will quickly grow beyond the Facebook Group limits. In way Facebook Groups should be renamed Small Facebook Groups because the functionality really favours smaller groups. The Facebook Chat is great feature to chat with a small group but doesn’t scale well to larger groups.
In the end I think most groups are probably better served by something like Google Groups which allows a common mail listing and some basic HTML pages.