I really, really like these tools, I think they offer such flexibility. My big BUT with it (and other online tools) is the issue of trust. We trust Google (and others) thatthey will be around for a while, so we can still access our documents. We trust them to keep our information safe and secure. We trust them to provide 24/7 access etc etc.
Hmmm…we really do live and work in interesting and challenging times. What a great time to be a librarian!