@FZ14: You wish for jQuery to be ported to TypeScript.
I just want to point out that you don't actually need to port existing libraries to TS in order to get a strongly typed experience consuming them. TS let's you write "declare files" that describe a typed view of existing code, so that you can get IntelliSense and type checking against them when you consume them from TS.
Our hope is that authors of JS libraries will also author .d.ts files for them. If you write your library in TypeScript, the TypeScript compiler can also generate a .d.ts file for it, along with the JS.