TechCrunch has a pretty good round up of social music sites and services (more than just internet radio). If you like music or like discovering music, you should definitely check out the post. While it’s a good write up, it’s difficult to cover everything so don’t skip the comments. TechCrunch readers have contributed more music sites and services and you don’t want to miss those.
While not a social music site or service, don’t forget we have our own little WordPress sidebar widget for di.fm/sky.fm. The sidebar widget allows you to configure the widget to either display a specific di.fm or sky.fm channel or randomly rotate through the available channels.