- notes.variogr.am – Why music ID resolution matters to every music fan on Facebook
A bit techy, but a good read, and an insight into the problems that Spotify and last.fm have to work hard to solve. I'm not posting this because it's hard on Facebook – they've stepped into a difficult arena, and have some catching up to do, but that's not a crime – but because it's an insight in how complex technical problems have very simple, very direct real-world impacts.