Google Sites versus Sharepoint - how about Sosius?

So, last year at the Office 2.0 conference in San Francisco, I got my introduction to Sosius. For those of you who share my knowledge of EMC's eRoom, I would describe Sosius as 'hosted eRoom on steroids' (web 2.0 steriods). Sosius is a hybrid collaborative working environment, with personal and group dashboards, with access to a whole raft of tools, but it is also a Social Networking platform with Facebook or LinkedIn type qualities.