In case you don't watch the whole video: <a href="http://kernelnewbies.org/" rel="nofollow">http://kernelnewbies.org/</a><p>A great starting point for kernel hacking.
Greg is an all around stand up guy. I personally like his presentation style and even though I've been hacking on the kernel for a while now at my current job, I never realized some of the things he presented. The checkpatch script is great, except that a lot of companies still ignore it. Freescale's BSP patches are extremely poor by checkpatch's standards, and that's what I spend most of my days fixing
Greg Kroah-Hartman is a great speaker & teacher. If you'd like to jump into Linux USB programming, his presentation on that is golden: <a href="http://www.kroah.com/linux/" rel="nofollow">http://www.kroah.com/linux/</a>