Real.com’s music service, Rhapsody, and video retailer Netflix get 20 percent of their sales from products not available in Wal-Mart and Blockbuster; Amazon.com gets 57 percent of its sales from titles you can’t find.

Wired’s The Long Tail explores the “new economy” of e-commerce sites that have endless inventory, without the costs associated with physical space

(Via Poynter)