Linux.com is running and article on how a group of librarians Georgia Public Library Service have developed an open source enterprise class library management system that has the potential to revolutionise the way large scale libraries are run.
You can read the article here.
The production system is code named Evergreen, and you can find out more about it here, and use the working system, here.
My first impression of it is that I like it, it’s simple to use and doesnt feel like an OPAC, like the hugely disappointing http://www.worldcat.org does.
Unfortunatly I can’t seem to login to the system with the demonstration username and passwords, but I am really interested in trying out the Shelf Browser feature.