+1 for CDBaby created by Derek Sivers. You can find his interviews discussing the creation of CDBaby at sivers.org His interviews with Tim Ferris are great.
I think I read that he sold in for something in the range of 20 million. His business model for CDBaby was interesting. I interacted with him via email for a bit when he was starting his recent or current venture, Wood Egg, which was a project to create a series of startup ecosystem guides (books) for many countries in South / East / South East Asia, written mainly by people familiar with or from those countries. Interesting idea.
