What a time to be a librarian!
First off I found out that I'm not dooming myself by moving from sysadmining to librarianship -- not too worried about that, but hey -- and I wake up this morning to find multiple references to something pretty damn exciting, and written in Ruby on Rails to boot.
"In a nutshell, LibraryFind is metasearch software developed in Ruby on Rails, and released under the GNU General Public License. It does both federated and local search, provides the ability to harvest metadata collections into a local index, provides an integrated OpenURL resolver to allow for linking to full-text resources, and allows for the ability to customize the user interface (or even to build new user interfaces!)."
Oregon State's got a demo here.
This is pushing all my buttons. I'm at the ref desk currently and I've got to prep for class later today, so I can't really mess with Libraryfind in the way that I'd like to, but once I get some free time I'll be swinging away at it.