After playing around with it a little bit I decided that it would be handy if the toolkit was actually contained in a NuGet Package. So I created a fork and pushed it into the temporary NuGet Package repository. The package has now been accepted and is available from the package manager console in Visual Studio 2010 (with NuGet installed, or ASP.NET MVC 3.0 or above).
The first thing you need to do is open up your ASP.NET application inside Visual Studio 2010. The package assumes that you are using ASP.NET MVC, but to be honest it’ll work just fine with plain-old ASP.NET as well (except that the samples will be located under /Content/JitExamples/).
The package contains three script files (jit.js, jit-yc.js, excancas.js) and a number of samples (under /Content/JitExamples). Once you are comfortable with how the toolkit works you can simply delete the examples.
If you want to get a feel for what the package can do, set the various HTML files under JitExamples to your start page and hit F5. Enjoy!