Personalized radio streams

Personalized radio streams are tailored for each user taste, otherwise they function just like the traditional streaming audio. I have tried two such services: www.pandora.com and www.last.fm. Before you can use the service you need to register, and then provide some information about the style of music you like, for example the name of an artist. In case of using last.fm you also need to download some software. Personally I think that Pandora is able to generate better play lists, but then again I have used Pandora much longer. But last.fm has some additional services, such as information about the artists and lists people with similar music taste. But there isn’t really a need to select one of them - you can just use both:)