Visual Studio 2013 Update 2 includes TypeScript 1.0 out of the box. Alternatively, there is also an add-on for Visual Studio 2012 and a Node.js package.
You can install the node.js package using the following command:
npm install -g typescript
Microsoft announced that they are now accepting contributions from the community. They will accept bug fixes and documentation improvements at the moment only, but in the future they will probably accept new features as well.
Until now, the community reaction on TypeScript was “wait until it’s ready”, at least as far as we have noticed. Now it is ready, and we will see if adoption increases both in community and enterprise.