Me too! My Macbook 4,1 isn't used as much anymore, and pretty soon I'm going to be building a badass hackintosh that will replace my Windows Desktop and Macbook entirely. Plus I have multiple 2.5" HDDs for various testing available to me. So I'm ready willing to test anything you've got HackerWayne!
I'm not a noob either, but I'm not completely versed in this stuff. I can probably figure things out for testing purpose though.
And again... You're never, ever going to see a fully featured, 64-bit kext for the x3100 unless Apple release one. It takes large teams of people to write, test and maintain a graphics driver - you definitely won't get one from the community.