The Social Enterprise

I'm sure that at one point or another Microsoft and will do what they do best, copy catch up with facebook and bring some of that social goodness to the enterprise through their Sharepoint Collaboration Platform. In the mean-time how about taking a look at some of these abuzzing platforms that are bringing the Social Enterprise to a Corporation near you now.

yammer.com
Chatter
Jive
Cubetree (SuccessFactors)
theFlowr