Burke, a South Carolina software tester, operates a popular series of Web sites called Scopecreep.com, where he's posted thousands of digital music playlists, from "Best songs of 1989" to "Palindrome songs," that can be played by any Yahoo or RealNetworks Rhapsody music service subscriber.
On one level, this is little different than the age-old practice of making mixed music cassette tapes for a friend. But as online music retailers look for ways to guide listeners through catalogs of millions of songs, thisis drawing renewed attention, particularly from subscription services that see people like Burke as key allies in their fight against Apple Computer's popular iTunes.
Last week, Yahoo the creator of Webjay, a site for posting playlists. Yahoo is getting in on what could be a major part of the online music business: A recent joint study from Harvard University and the Gartner Group predicted that by 2010, 25 percent of online music sales will be sparked by consumers recommending songs to one another.
"We fit in between traditional media and word of mouth media," Burke said, explaining the appeal of sites like his. "We're that in-between world that's the best of both worlds."
To date, the playlist-swapping boomlet represented by Burke, the newly Yahoo-owned Webjay and others has been more of a grassroots phenomenon than an effective weapon in the digital music wars. But ambitious subscription music services see music-sharing tools playing an important role in their futures.
A key feature of subscription services is that they give their users the ability to listen to unlimited amounts of music. As long as two people trading song recommendations have both paid the service's subscription fee, they can legally listen to thousands of songs, or swap dozens of playlists without any additional fee.
"The people who get this are those who are more engaged," said Evan Krasts, director of product management for RealNetworks' Rhapsody service. "If you've got someone who understands what this is about, you're going to get someone who's going to be a good customer."
iTunes itself is also a haven for playlist makers. Indeed, its iMix section, with more than 330,000 playlists contributed by individuals, is one of the biggest repositories of music recommendations online.
But at 99 cents per song, a 10-song iTunes playlist costs $10 to download, which limits the amount of songs that people can actually listen to, subscription service executives say.
Still, that argument hasn't exactly triggered a mass rush to subscription services. Carried on the back of the, Apple's iTunes remains far and away the most dominant force in the digital music business. Apple executives have said that consumers want to own their music, rather than "rent" it through subscription services.