Wikis are a great way to become collaborative in a particular area of interest. I can see using and setting up a wiki so that short cuts and tips on using our database can be shared. News and deadlines could be posted, but other users could add information too.
In a libary, I could see this being a wonderful place to post news, add feeds to news articles of local interest, a great place for rollyos.
I'd like to explore this in greater depth.