Whoa, thank you sir. I assumed it didn't support it because I couldn't find a Typescript plugin when I searched their repository. I didn't think it would just be built in.
The TypeScript tooling is completely open source (and actually written in TypeScript itself). So yeah I think we should see more support for TypeScript as it gains more traction.
http://www.jetbrains.com/idea/webhelp/typescript-support.htm...