Anyone who has Office and uses GoogleDocs as either their primary or backup storage location should at least try this plug-in. Why?

1. It's free.

2. It simplifies the sync between your MS Office Docs and Google Docs.

3. It's free.

I'll have more feedback once I see how it works offline, but when online I can open items in my Google Docs store directly from Microsoft Word in addition to setting permissions as if I were logged directly into GDocs. Yes, those dolphin noises you heard off in the distance a couple hours ago can totally be traced back to yours truly.

Anyway, give it a shot. It may make your life easier.

OffiSync

ETA: Link to original article that offers two other sync platforms that might be worth trying. Syncplicity definitely looks interesting. I haven't delved into the security aspect of it yet, but I intend to.