Those who browse real estate listings for fun can now create Pinterestesque boards of properties in the category of their choice, or just collect a bunch of stuff they like. More mundanely, people can just use it to string together a list of must-see houses for the spouse to peruse.
http://blog.sfgate.com/ontheblock/2013/02/05/redfin-collections-scary-shacks-extreme-taxidermy-and-more/
#housing