The "Elastic List" faceted navigation concept proposed by Moritz Stefaner has been nicely demonstrated for exploring the information behind the past Noble price winners. The new NYTimes Article Search [moritz.stefaner.eu] project transposes this concept to the recently released NYTimes Article Search API, which covers over two million articles.
Users can narrow their searches through the huge New York Times database by keywords, persons, location, year or organization. However, as the API seems to support only one value per facet, all facets are single-select only.
See also A Yearly NYTimes Article Overview.