Bravo! I'll add my voice to the hubub surrounding the announcement that NCSU has launched a new library catalog, representing a new model for user interaction. I'm a huge fan of the "narrow by" menus on the left-hand side. (I should be--we did this in a digital library system a few years ago: here's an example and a paper describing the project.) I believe some of the options presented here are more useful than others, but different options would be useful in different situations and picking the right default is tricky.
I also love the idea of browsing the collection in the OPAC. Long have librarians extolled the virtues of the serendipity of shelf browsing. Our catalogs can and should try to replicate this experience online, and allow other sorts of browsing our shelves don't provide.
Despite the increased functionality of the NCSU catalog, the results within any given set, regardless of the sort option chosen, are the same sort of jumble we see in more traditional OPACs. I'm thrilled to see that FRBR-like grouping is on the list for the next release.
It's too bad that NCSU had to go to a third party (and presumably shell out some big bucks) in order to provide this innovative service. I hope this demonstration will push more of us to relentlessly push our OPAC vendors for similar improvements, and put our money where our mouths are.