This is a really great service for real-time document editing and collaboration. Like Google Docs, if it had syntax highlighting, chat, and playback built in. I really like the home page, too. It has all the information you need to get started:
Welcome to Stypi!
Synchronization
This document is synchronized so everyone viewing this page will see the same thing. Share this link with others to collaborate!
Syntax Highlighting
This editor also supports programming languages. Choose your favorite language in the dropdown above and start coding in it with others!
Thats it.