EtherPad looks like a Cross Platform SubEthaEdit. Wonder if it will scale and how spammy it will be!

QUOTE [From EtherPad: J7AOIZop0S]

Welcome to EtherPad!

As you edit this text area, anyone else viewing this same page will

see your changes in realtime. You can see their edits in realtime

also.

To share this pad, just send them the URL:

http://etherpad.com/J7AOIZop0S

Hello etherpad!

END QUOTE