To everybody looking for alternatives: http://mooma.sh/api.html
We are a small team and have been working on our own implementation of song/identify based on echoprint codegen for a while now. With news of Echonests song/identify shutting down for developers, we decided to soon offer developers access to our cluster. The syntax will be similar in order to make the transition for existing apps as seamless as possible.
We hope to open our doors for developers in early January.
For more info and to be notified as soon as we launch the beta: http://mooma.sh/api.html
I hope I'm not stepping on anyones toes by posting this here. Thank you Echonest for making the amazing echoprint codegen open source!