To use Chattp you just type in a url and Chattp will chattify your page by augmenting your browser window to add in a realtime chat panel to the left hand side of the window.
Anyone you share a Chattp link with for a specific page or website will be able to participate in that chat, and each link is unique, so multiple chats can take place on any particular url.
Have a play and feel free to share it around. No login is required to use Chattp.
Here is a Chattp link for this page http://chattp.com/2QY5Ct
This is an alpha release so there are bound to be bugs and stuff. Chats are currently private, but not encrypted.
Made with: node.js, express.js, pusher, mongodb and hosted on Nodester