Becoming a Linux Kernel Programmer?

Young Grasshoopa asks: "In my 6 years of IT life, I've been a sys admin, perl programmer, and a config. mgmt. engineer. I've recently learned programming in C, and somehow ended up learning a bit of Linux Kernel programming as well. I now have developed a strong motivation to become a Linux kernel developer, but given my background, I am not sure how to approach companies or Open Source Project groups. I ask all those who were in a similar situation - how do you become a full-time kernel developer?"