This is very very cool. I think it does exactly what you set out to do: be a sort of virtual library to gawk at (

). Seriously though, it does a great job at both showing off the actual covers as well as give an idea of how they all look together. I know you've shared pictures of printed covers before, but IMO this does an even better job at showing the unity across spines, which makes it look very very nice indeed.
Nice recs, too.
