I've added a binary version of the Start Menu preview to CodePlex. I'm still working on the code (I've got a lot of ideas!), so the source is coming later.
There is currently only one item in the start menu by default (Windows Explorer). And there is no user interface for configuration yet, but you can add programs yourself by adding lines to the file menu_config.csv.
Please don't change the first line. Lines for programs have the following format: [Name];[Path]
To show the menu, present your open hand to the kinect at a distance of around 0.5 - 1 meter. To close it again, just close the hand. To start an application, stretch out one finger, move it over the icon, then close the hand quickly, so no finger is visible anymore.
To stop the application, press escape while the menu is shown.
Side note: Maybe you've noticed the new PayPal donate button on the right side of the blog. I've decided to publish the quick start menu (and maybe more) applications for free as open source, but added the donate button in return. So if you would have bought the program, you are welcome to donate a small amount to help me cover expenses.