That is actually a very good idea. We should also probably have someone serve as editor for that section, as it should be kept to the bare minimum to get the desired effect. In normal articles no one makes any claim to how difficult they are, or how bloated with extra information they may be. In a section like that it would be useful to have someone checking to make sure theory stayed out of them.
It would probably also be useful to catagorize them by api under the topic. For example if you had a topic of "stencil shadows" you would want one for opengl and another for DirectX. "how to make a hinge joint" would also need seperate sections for seperate physics systems.
I would be willing to write up a few, especially since they would be small enough that they could be written relatively quickly. This might solve the cyclic problem since they would most definately include code that could be dropped in without fully understanding the theory. Then as the user grew to know more they could work on tweaking the code to their special needs, or for the likes of quaternions, never touch it again because understanding the theory doesnt really help you much.
In short, I like it.