How to start Android Kernel programming?

Question

I have 6 months experience with Android, developing simple UI-based applications. Now I want to write applications targeting the Android core Kernel. For example, I want to

Answer 1

You should also check out http://pdk.android.com. I just found this site recently and it is extremely useful. I wish I knew about it sooner. I'm not sure how dedicated Google is to updating the site because as BMB mentioned the vendor stuff was moved to the device folder in 2.2 but there have been no changes to the PDK site to reflect that. Also, some of the links don't work but I was able to find all the pages by doing a site search in Google.