This is neat. I use a similar tool on VS 2013 [0]. MS launched it very recently. It's called Bing code search. Pretty nifty, Although it's lot advanced but I hope tools like this grow to be better and comparable to this one. Anyone using vs 2013, do check this out.

[0] http://visualstudiogallery.msdn.microsoft.com/a1166718-a2d9-...