I decided a while ago when I created the Wolfram|Alpha .NET library that I should create something meaningful with it. After all, with that library, interacting with the WolframAlpha API from C# has never been easier.
After a bit of development I developed Wolfram|Alpha Bot, and with the approval of Facebook it has been released to the general public.
You may interact with it through it's facebook page: https://www.facebook.com/WolframAlphaBot
Go ahead and try it! Here are some examples of what you can ask it: http://www.wolframalpha.com/examples/
Keep in mind that neither the library nor the bot are an official product of Wolfram Research.
Original post in Wolfram Community Forums: http://community.wolfram.com/groups/-/m/t/1220925
Wolfram|Alpha .NET repository: https://github.com/xjose97x/WolframAlpha
Wolfram|Alpha .NET NuGet package: https://www.nuget.org/packages/Wolfram.Alpha/