Spotify, the music subscription service that has been so popular in Europe, is now available in the United States. Spotify offers users the ability to stream limited hours of music for free or stream unlimited songs for a small fee, from a library of over 15 million songs. And while it has a Spotify API out of the gate, it comes with a catch.
Sometimes it takes a little human intervention to make semantic applications easier to build. The Guardian newspaper has augmented its Open Platform API with unique identifiers for bands and books. In turn, the company has simplified the process of creating a mashup that uses multiple sources to focus on a single work, which may help its content spread farther.