SpiralFrog Offers Free Songs – With a Catch

In one of the bolder experiments to date, SpiralFrog.com, a service scheduled to open today, will let Web surfers download songs by U2, Timbaland, Amy Winehouse and other Universal Music Group artists free. The catch: Consumers have to wait 90 seconds for each track to download, and they must answer questions each month about their buying habits. In addition, the songs can’t be played on iPods or burned onto CDs as they can with 99-cent downloads from the dominant online music store, Apple’s iTunes