Forbes has a good piece on “stealth project” Facebook for Work.

Ultimately the author gives the nod to Salesforce Chatter’s long history & more robust feature set.

That said, the always intriguing (for it’s hard to disprove that disruption won’t occur) angle is embodied in this quote

With Facebook at Work, users could sign on to both the corporate and personal account, according to the Financial Times. Facebook at Work, in short, would launch offering companies a system that has the fastest learning curve ever in the history of enterprise software. Also, it is hard to imagine companies having to coax user adoption with Facebook at Work, as is often the case with other software packages, especially CRM.

And their conclusion mentions all the big names

For that reason, the arrival of Facebook at Work is not likely to be met with indifference by enterprise software companies. Even Google with its array of enterprise productivity tools could be threatened by Facebook at Work as well as Microsoft’s Yammer.

to say nothing of #WIREDchic Slack helping to prove the point that Social Enterprise is everywhere