A little known online music store is experimenting with a new pricing system in which most songs start out costing a dime, and their prices fluctuate from there based on customer demand. The 10-cent songs are a temporary phenomenon. Like every other music service, MusicRebellion has fixed costs it must pay music labels and other rights holders and is taking a substantial loss at that price. But the company hopes that the promotion will help show other e-commerce services the benefits of floating prices. Read more: CNet News.