Reynout, you are dead on.But, what Yammer does have is a good easy to use offering that works decently out of the box (yes, it is still rather buggy), which is is something Sharepoint doesn’t and takes a lot of effort and requires skills most IT departments lack as well as lacking in most consulting, contracting, and implementation services.The free accounts in Yammer are missing needed depth in understanding around use and adoption, which require community managers and change management understanding in depth. The freemium model is problematic in this regard for Yammer.I deeply agree with regard to Newsgator as that was my first brain dead no questions asked smart move to make by Microsoft. No other service nor platform ads more value more quickly to Sharepoint than Newsgator. The tight integration is a great benefit as most organizations are trying to squeeze the most out of Sharepoint that they can due to its high cost and most see the social components as something they need to take advantage of. Once the lightbulb triggers that this social stuff is really difficult to get right organizations usually quickly turn to other options to plug-in or add on.