NINES, has announced its formal release. Collex is the technology driving NINES, developed with Bethany Nowviskie's leadership and elegant sense of design. Thanks to the others on our team that made this happen: Jerome McGann for believing in and funding our vision, Jamie Orchard-Hays for rapid Rails magic, and Duane Gran for keeping the machinery running.
Collex is the basis, idea-wise, of Solr Flare, a generalized faceted browser.
Interestingly, I've found some Sol(a)r themed NINES objects.