Has anyone heard of a website called myradiomix.com? I’ve heard they offer free and live radio from Europe, US, UK and around the world

Winamp has it built in. I think its in the Winamp Radio Tab. It has a lot of different internet radio stations.

Pandora.com

I'm not sure why you'd listen to anything else....

I recommend Deezer.com, they have/had music streaming on demand but I don't think they have it for many songs anymore...