Welcome Echo Nest!
In case you missed it, we just acquired a company called Echo Nest in Boston. These people have been obsessed with understanding music for the past 8 years since it was founded by Brian Whitman and Tristan Jehan out of MIT Medialab.
We think this is such a great fit in a lot of ways. In particular, they have focused on very complementary things to what we have. While we have spent a lot of time on things like collaborative filtering, A/B testing, learning from user feedback, and scalability, they have spent time on audio analysis, cultural understanding through web scraping, playlisting, and building a kick ass API.
We're super excited on starting to incorporate Echo Nest's technology into our own product and we already have a couple of things in the pipe we might launch shortly. Stay tuned!