The SharkAttack (yeah!) started out as a radio show on Codebass Radio. It started out as an Adobe AIR based tool to CREATE the radio show. Since then, I've flipped the project around and turned it into a service that runs on Node.js. It still powers the radio show called SharkAttack, but it also powers my music discovery website at Blastanova.com.
The SharkAttack service gathers up music from blogs all over the internet, downloads them, converts the videos to MP3, and packages them up as a playlist to play every Wednesday at 1pm EST on CodebassRadio.net.
It's coming along pretty nicely, and I've done 50+ shows with it so far - and I'm always improving. Who knows, maybe someday I'll make it available for general use!
You can find the SharkAttack Codebass Radio show page at sharkattack.blastanova.com