The Clock Radio application that was released a few weeks back has taken off in Japan. While the application has been getting limited traction in the US it has skyrocketed to the number one utility spot in the Japanese market.
The application features radio streams from many diverse musical and cultural tastes, all powered by ShoutCAST radio. The application is fun new way to stream intenet music to your iPhone. Currently on sale for $0.99: Additional details are available here