Good introduction to the .NET Reactive Framework

.net, asynchronous, c#, system.reactive

Solution

Here's a wiki site with lots of code examples demonstrating how to use different features of the .NET Rx framework: http://rxwiki.wikidot.com/101samples

I found this to be the most comprehensive site out there, and the one that's quickest to get started with.

Problem

Aside from the Microsoft documentation, is there a good introduction and tutorial to the Microsoft Reactive (Rx) framework? Also, what is a good example (with code) that Reactive makes easier of a programming problem that is challenging to solve using conventional asynchronous coding techniques?

Original source