MSFT Office Live Workspace is in Beta

First impressions:

You can use firefox.

Worked on 2007 but not 2003. I assume this means it requires Office 2007 or better.

Requires an additional download (update to Office, which I believe also authenticates your copy) to create or edit files. (Can view files without)

No OneNote Live (yet?)

Overall, I must say it is pretty janky.