Okay, I'm feeling kind of cocky, I'd like to dig into some kernel   
programming.

I've got good asm skills (on the Z80, 680x and 6502, but the 32bit stuff   
doesn't look too different) and my C isn't half bad.  The kernel source   
is so large; it's hard to figure out where to start.  I have a basic   
understand how the NetBSD tree is laid out, but the interactions are so   
hard to follow; without some sort of a map.

What would be a good source on breaking ground into this area?  How did   
others get started?

jam