A Microsoft Channel 9 video of Hejlsberg discussing TypeScript is available on Microsoft's Web site:
Soma Somasegar, Corporate Vice President of Microsoft' Developer Division, outlined the problem space that Microsoft believes it can solve with TypeScript in an October 1 blog post:
Microsoft's official site for TypeScript is http://www.typescriptlang.org/.
What are your initial thoughts on what the Softies are doing, any of you developer-readers out there?
Update: In spite of the Somasegar quote above regarding the Windows Store -- if you still were unsure whether you can build Windows Store apps for Windows 8 and Windows RT using TypeScript, the answer is yes.