"The really important cultural innovations are the ones that blur the definitions of old categories. The VCR clouded the distinction between TV and movies. The World Wide Web punched open the wall between print and video.
Now, a site called Mercora is busy rubbing out the lines separating radio from music downloading. As with radio, Mercora plays music chosen by someone else, according to the DJ's tastes and rules. But as with downloading onto your iPod or adding a CD to your collection, Mercora lets the user decide what music to listen to." -- From Washingtonpost.com