Thanks to Fiona and Tim for being all managerial and figuring out the licensing story for extensions that I've written, you can now find the code I've written for both the ItalicComments and GoToDef extensions.
I've placed them both under my new github account, so please fork them to your (collective) heart's content and release your own extensions. If you have any questions, feel free to ask them here, to my twitter account (noahsmark), or email me directly (noahric [at] ms).
If you don't have git installed on your Windows machine, github has a good walkthrough for working with Windows. I use msysgit, like it suggests.