http://docs.google.com/
You can login with your google (i.e. gmail, etc) account and check it out. Pretty nifty at first observation especially since you don't need to install anything.
Quote
Welcome to Google Docs & Spreadsheets!
With Google Docs & Spreadsheets, you can:
* Use our online editor to format documents, spell-check and more.
* Upload Word documents, OpenOffice, RTF, HTML or text.
* Download documents to your desktop as Word, PDF and more.
* View your documents' revision history and roll back to any version.
Plus, since its online, you can:
* Invite others to share your documents by e-mail address.
* Edit documents online with whomever you choose.
* Publish documents online to the world, or to just who you choose.
* Post your documents to your blog.
A little behind on this one Jason. This came out ages ago. :P
hmm...maybe some sort of functionality changed then? There was a big article on it this week. Oh well, can't win 'em all :D
Well, the only thing that I've noticed change over the last 5 months they've been running it (been using it, very handy!) is that there is a link at the top of Gmail and other various Google services. Except there is no link on the top of the personalized homepage for some reason! Maybe that change helped some columnists realize it was available. :)