Welcome to vian, a vi-clone that lets you edit and save to your Google Docs account.
You can view the demonstration video to see the basic features.
I started this as a free-time project and made the decision to release it in one month no matter what state it was in. You're seeing the result of that. All included functions work, but many are missing. Bugs in Firefox aren't worked around.
The good news is that I spent a lot of time making sure the design of the editor made it as extensible and flexible as possible. Under the hood it uses a lot of ideas from emacs. The source code is available at Sourceforge.