[peterkshultz]

As others have said, this feels very similar to Yammer. Microsoft has made a strong pivot to enterprise software over the past couple of years, whereas this feels like Facebook's first foray.

Although I don't doubt Facebook's agility, I give other enterprise software companies the advantage sheerly due to their head start.

[j2bax]

The benefit Facebook has is hundreds if not thousands of hours of familiarity with their overall interfaces (per user). When I viewed their demo videos, it all looked extremely familiar to me, having used Facebook since about 2006. Whether or not this is the case, it made the design feel good and pleasing.

When I look at Yammer or other services that are totally fresh, I am not at all familiar. I'm totally willing to learn new interfaces and get familiar, but there are a lot of people that would prefer to stick with what they are familiar with.