Seriously, though, go check out the Yammer UI and you'll quickly see that it is a blatant clone of Facebook. Then again, this goes for most of the competitors in that space, whether it's Salesforce Chatter, IBM's Connect, or whatever else.
source: messed around with all these things to build automated compliance and archiving products.
source: messed around with all these things to build automated compliance and archiving products.