In a previous post, I mentioned that version 3 of the Web Essentials tool no longer has any TypeScript support.
I was prompted about several Visual Studio updates, one of which was Web Essentials: Oh Joy of Joys, Mads has put Typescript back into his tool. The change log is here. 15th Jan TypeScript support is back!!!
Now Web Essentials for Visual Studio 2012 and 2013 have Typescript support again, and best of all, the Preview Window is back.
From me, and a 1000 other developers, Thank You