When the web world is moving towards increased collaboration, its nice to know about CoActLive.com. I just bumped into this website while reading an article on CIO.com. Its a wiki that offers a secure collaboration environment for various kinds of user groups.
A couple of key features of this wiki is that -
It offers Fax integration
You send a fax to a special 800 number, and it gets converted into a PDF
It offers Voice Mail
Record your voice messages and attach them to pages
I'm now keen to try this out sometime when I get a few minutes. They have a banner in the site that reads "Get your first wiki now. Sign Up! Its Free!". They also have a pricing list that never mentions about this "Free" subscription. Its a bit misleading. Will anyway want to give this a shot.