Here's just what I know.
Today, I’ve hosted a BitTorrent Tracker server on AppFog. The tracker server is written in node.js by Emil Hesslow and it works great!
Here’s the tracker: http://licaon-track.ap01.aws.af.cm/ (The tracker server is in Singapore.)
I hope that helps you and more users will use the tracker. (Of course don’t use it too excessively as I only used a free plan.)
From my recent post, I’ve teached you to create a youtube downloader in PHP. This time, I created a YouTube streaming server in node.js and pushed it on GitHub. Check it out!
It also implement a way to stream / download YouTube live videos and streaming only the audio using FFMpeg.
Also, check the documentations. You’ll see a lot of things! 🙂