I am a big fan of Google Docs, but my workplace likes to keep internal documents internal. Is there a good real-time collaborative editing tool to work with .doc, .doc, .odt, or similar document formats that may be openable in Word (eventually) that we can deploy on our network? Preferably free, but we wouldn't mind a small fee. If there is a WYSIWYG (or close there to) LaTeX editor like WriteLaTeX that can be installed locally, that will get bonus points with me.
I like Etherpad, but it doesn't support more than text and html.