Just so I don't re-invent the wheel, does anyone know if there is an addin for MS Office (Boooo!!!!) to use the Zimbra (Hooray!) Briefcase as a file-store.

I was thinking a-la 'Office Live Workspaces' addin.

I was thinking about maybe just adding a 'Save to Zimbra Briefcase' option to the file menu which would save/upload/delete a temp file. Any suggestions?

Don't hold you breath for progress, though; it'll definitely be an 'as-and-when' project.