Sharing a note is simple enough, either by email, Cyn.in account (Cynapse's own enterprise class application) or just choose one of the popular social networks from the list.
The application isn't made from scratch however; it is based on the now defunct Etherpad, which Google recently bought over. However, there are a lot of developers spinning their own versions of this web app.
What sets Cynapse's Sync.in apart from others is that it has a desktop client that can do pretty much everything that the online version can. The desktop application is compatible with Windows, Mac OS X, and Linux and has a very itunes-like feel to it with a very handy search function to locate those myriad notes you may have.
So if it is document conferencing that you need give Sync.in a spin, you may just like it more for the simplicity than anything else.
Check out a quick intro video of Sync.in. If for some reason the embedded video doesn't work, check out the direct youtube link.