What are some new services entering the enterprise collaboration space?

The most activity in Enterprise Collaboration is currently happening with SaaS providers that either provide point solutions (e.g. Microblogging) or a full collaboration platform. The traditional on-premise vendors are not exhibiting the same level of innovation nor are they pushing their products forward. Many of the platforms have matured beyond the basic blogs, wikis and forums and have the document management and collaboration capabilities to provide a full enterprise solution. We increasingly see clients looking at SaaS vendors to provide their corporate intranet environment.