Hi mrfoyne.
It is not a good idea to include your API key in posts, because then nefarious people are apt to find it and use it for questionable purposes, and it'll be disabled.
Besides that, this isn't the best place to get detailed help debugging your JavaScript code. Start by reading the API documentation, especially for artist/biographies, and make sure you can make the requests you want by typing them into the address bar of your web browser. If you're having trouble using the API, don't hesitate to ask.
Once you're getting the right data from the API, getting the rest of your app working is a matter of web programming, and isn't really specific to The Echo Nest. Perhaps others here can suggest some good tutorials or resources to help, but you're unlikely to get line-by-line debugging advice. -Eli