Linux kernel booting process, part 5
github.com
github.com
I'm sure sometime in the future I'll get that itch to dive back in, and this will be a great resource.
Newbies to the kernel should also check out the Eudyptula Challenge (http://eudyptula-challenge.org/), it provides a structured approach to the kernel and makes you actually write the code. A downside is it's very popular and they've had trouble processing so many emails and solutions.
I think these resources, paired with what we have here could allow even non-kernel hackers to get some code into the kernel.