Writely, The Web Word Processor

Great news from Google,
Share documents instantly & collaborate real-time.
Pick exactly who can access your documents.
Edit your documents from anywhere.
Nothing to download -- your browser is all you need.
Store your documents securely online.
Offsite storage plus data backup every 10 seconds.
Easy to use.
Clean, uncluttered screens with a familiar, desktop feel.

Now here is the bad news, You have to wait to get it.
Go sign up now at:
http://www2.writely.com/info/WritelyOverflowWelcome.htm