Given the very sad state of the extensibility of Visual Studio (I wrote about it earlier this year http://evain.net/blog/articles/2012/02/27/visual-studio-your...), it turns out that not only are the Python Tools an excellent plugin to write Python code in VS, it's also one of the best example of how to implement support for a new language or a debugger in Visual Studio >= 2010.

Some things we do in my product would not have been possible without having access to the source of the Python Tools (which again say a lot about the sad story of extending VS).

Shameless plug, if that's still too much work for you, you can contact my company to integrate your language in VS.