Reactive Extensions (a.k.a. Rx) is one of those technologies that really lights me up. I sought out Matthew Podwysocki (@mattpodwysocki) - the principle contributor to Rx.js so I could give you an introduction to this technology and ask him some questions about the project and where it's headed.
You'll be able to use Rx in pretty much whatever language you use: JS, Swift, Scala, Java, Netty, Python, Ruby, .NET, Clojure, Go, and more. Come on... Netty?! I haven't even heard of Netty!
Get more information about Rx at reactivex.io and get involved in the code by visiting the repository at github.com/reactivex. But for now, watch this episode and let Matthew tell you what it's all about.
As always, chime in below using the comments.