Actually you're right. I can see this being one of facebook's bigger high profile flops. After talking to the "Facebook at Work" team at F8 (very very nice people), I thought that they might be in for a rougher time getting their corporate product to compete. According to what I understood, the project is a satellite product being developed in the UK offsite from facebook's HQ in Menlo (and as a result absent from the real leadership's radar). It seems like it will be difficult for them to really penetrate into the non-consumer space without direct line of leadership from upper management like Zuckerberg. This product seems more of an experimental "throw at the wall" and see if it could potentially stick. I am going to agree with you here and say likely no.

What company only has successes? Seems pointless to try to extrapolate from a single failure.

A few large companies are moving to it, but don't forget how long the corporate sales cycle is for this type of thing. We'll only know if it's a flop in 3-4 years.