In context of Microsoft Turkey Summer School 2014, I had a chance to give a talk on ASP.NET Web API and ASP.NET SignalR a few days ago at Microsoft Turkey Office. You can find the slides of the talk on Speakerdeck.
The talk was in Turkish and it has been recorded.
During the talk, I referred to a few resources about SignalR and ASP.NET Web API. I tried to put all of those here:
ASP.NET Web API