I have created a website 3 years ago http://www.ilovethismusic.com/ that the whole purpose is a simple way for people to type any keyword and listen to music. Unfortenately in a few days the hosting would expire and i will stop supporting it. If there is somebody interested in any way contact me on email@example.com. The website currently uses little data from echonest, but i have some large ideas for it. If you want to continue working on it, the whole code is open source here: http://ilovethismusic.codeplex.com/.