Socialtext.com - Simple online business collaboration

Instead of teams or collaborating partners sending emails and attachments back-and-forth, why not try out Socialtext, a private, secure, simple and flexible group-editable website. Yes, it´s a wiki. Online collaboration is the teamwork of the future, and Socialtext is the wiki to help your company get the job done.

“Socialtext provides both a hosted service for maximum convenience and a hardware/software appliance for easy behind-the-firewall installation.

The Socialtext wiki will fast become a favorite way for companies to get their projects reviewed, edited, and produced. The site will bring in revenue from its fees, and it will be able to continue improving its services, which will attract more clients.

What does Socialtext offer that makes it better than Wetpaint´s wiki (which does not charge an installation fee)?