This is precisely the reason why I don't use Google Docs for any mission-critical documents. Store them in Dropbox or some other shared, automatically-backed-up

This is precisely the reason why I don't use Google Docs for any mission-critical documents. Store them in Dropbox or some other shared, automatically-backed-up system where you can easily retrieve a copy from somewhere. Always have redundancy too. We keep most of our files in Dropbox. But we all use Time Machine too. We also use version control for a lot of our work. This might seem like overkill, but each has a specific use and purpose with the added bonus of providing us with backup redundancy.