I agree with your comment in terms of “just another social network tool” so to say We are submerged by social networks, LI, FB, TW, you-name-it, and now GW.
What I am interested in, is how the concurrent editing capability can be used by a group of people collaborating on GW. So I look at it more as a 'productivity tool for groups' than as a social networking platform.

I am convinced that a tool for concurrent editing -which is what GW basically is- has a huge potential for ground breaking applications when used as a productivity tool for groups.
I am actually building such a tool in the Enterprise Camp, to speed up the discussion and knowledge sharing in the breakout groups (for more details you can check the website at http://www.enterprisecamp.org) and I am researching other real-life uses in order to make the best use of it.

In my opinion a tool for concurrent editing can add real value to a group's work, and I am looking for evidence!