Real-time collaborative text-editor. No account required. Edits highlighted in authors color. Infinite undo history. Syntax highlighting for editing code. Every keystroke backed up.
Update: "Google has acquired AppJet Inc. and its EtherPad collaboration product and technology.
The EtherPad.com servers have now been shut down, according to the timetable announced previously. Google recognizes the value of the EtherPad code base and has released the code as open source."
