Still is buggy, but I'm going for 'just ship it' instead of 'make it perfect.'
It's all client side so I'm hosting it on a static site on S3.
http://soundcloudinstant.com
It might help if you gave the user some type of feedback that shows why a particular result is included (if you can). I started typing/searching for "blue" and, while a few links had the word "blue" in the title, I couldn't really see why certain songs were picked.
Also maybe make it a bit more obvious that a song is being played. This is silly of me but I had the volume muted when I came to your link. I didn't realize that the volume was muted though and so, when I clicked on a song title, I thought nothing was happening. haha - my fault, I know, but just trying to share a "user experience".
Feature request: forward, back, working pause button, and auto start the next track at the end of the current one.