In a nod to the early 1990s, we made a JavaScript music quiz! It's based on your Last.fm profile (more specifically, your scrobbles) to find our how much you really know about the artists you listen to. Each set of quiz questions are therefore customised per user.
We've hooked it up to various APIs and include clues such as Last.fm artist facts, lyrics from songs and Echo Nest track data analysis (this artist is really dancey!).
http://users.last.fm/~duncan/boston
Last.fm, The Echo Nest, MusiXMatch