The National Library of Australia has launched the beta of their new search interface, SBDS Prototype (SBDS stands for Single Business Discovery Service, I think), and the search experience is not only better than any other library-related search I have used, it is faster than most of them as well!

Other reactions:

• Roy Tennant at LibraryJournal.comt
• Roy Tennant at HangingTogether.org
• Lorcan Demsey (1)
• Lorcan Demsey (2)

This is an excellent example of what is possible today, and what we should all strive for in our search interfaces.  There is such a diversity of resources, and unifying these into a usable and fast single-search service is a credit to the developers at the National Library of Australia.