Resources about Rx(Reactive Extensions)

http://msdn.microsoft.com/en-us/library/hh242985(v=VS.103).aspx

http://msdn.microsoft.com/en-us/data/gg577611

http://msdn.microsoft.com/en-us/data/gg577609

http://channel9.msdn.com/tags/Reactive+Extensions/

http://blogs.msdn.com/b/rxteam/

http://rxx.codeplex.com/

http://www.codeproject.com/Articles/162731/Reactive-Face-Using-Reactive-Extensions-Rx

and more by google(ing) it yourself.