You can bet that they'll integrate this with SharePoint. I don't necessarily think direct revenues from Yammer had anything to do with the decision. This isn't the first aquisition they've done this with - see Fast Search And Transfer a couple of years ago. The SharePoint product line generates huge revenues for Microsoft, so they could easily justify spending a lot of money on something like this.
So now we'll have another huge addition to this already humongous monstrosity. But I guess it's a good thing for Microsoft if they want to grow SharePoint into a SAP-like product that is everywhere and impossible to get rid of. Seems like a sensible purchase to me, although at a somewhat high cost. I think they paid 200MM for FAST a couple of years ago, for advanced search features.
So now we'll have another huge addition to this already humongous monstrosity. But I guess it's a good thing for Microsoft if they want to grow SharePoint into a SAP-like product that is everywhere and impossible to get rid of. Seems like a sensible purchase to me, although at a somewhat high cost. I think they paid 200MM for FAST a couple of years ago, for advanced search features.