I’ve played around with a few of these tools, and they can definitely make sharing easier. Google Docs is an easy way to share documents without having to email back and forth – just put the document online. You can choose who to share the document with, and you can even discuss the document back and forth while you both work on it. Very cool.
Wikis can be very helpful, and a number of libraries in our region are using them as information portals for staff. At MPOW, we have a wiki that is, frankly, not being used very much. It is used occasionally and has proved very useful in that area – we’ve stored the usernames and passwords for the various and sundry online sites where we have a “corporate” account.