Recently in the Google labs, they have been working on a new timeline – an interactive music timeline. The timeline spans from 1950-2010. It is interesting to see visually how the different genres have played out over the decades. Another interesting feature is the ability to search artists or albums. A small synopsis is given about the bands/singers. Sadly, in Canada, we cannot listen to the music but they are working on it! The player is only available in the United States for the moment. This website could be helpful for your music projects.
Check it out: http://research.google.com/bigpicture/music/#