The first tool I investigated is Google Alerts. It will certainly be helpful in many ways both personally and for my library. A well-formed search can be a great current awareness service for faculty. I am using it for professional development to follow the Kansas State professor Michael Wesch because I think he is doing really interesting stuff and this is a way to catch some things that may not appear on his own blog.
As it so happens, I have already started using Google Sites as a virtual space for my consortium’s cataloging group. They wanted an easy way to update the cataloging manual without having to go through a Website administrator. We investigated PBWiki and Google Sites and are going to recommend Google Sites next week. One major factor is that it is integrated with other Google tools. A drawback is that it does not currently provide an easy feature to back up your data by downloading a file of everything on the site like PBwiki does. Here is the discussion forum on the topic of a backup option.