This strikes me as a good idea/model. From the Seattle PI:
RealNetworks is moving today to increase the visibility of its Rhapsody music service, hoping to gain more paying subscribers with a greater presence on blogs and other Web sites.
The company is rolling out a Web-services platform that will allow third-party Web sites to link directly to albums and songs on Rhapsody. A blogger writing about a new song, for example, could post a link to a track that, when clicked on, will begin playing in a pop-up window.