I've been trying to run Mavericks on my 1201n since it was seeded as a preview, with no success: the kernel patcher module from Chameleon clearly needs to be updated, and since it's not developed by the Chameleon team itself, but by a third party development company (meklort's xZenue LCC), we haven't yet any ETA for this update. I tried the old kernel patcher from meklort, but also met with no success (which was expected, since it shares the same code with the kernel patcher module). So we've been stuck with Mountain Lion for quite a while.
As some of you might know, i'm deeply involved with AMD kernel development - and I'm currently the AMD Development forum moderator - and we managed to boot some AMD machines with a couple of beta kernels. These kernels are quite AMD-specific, and in fact i tried them with my 1201n, but they didn't work. However, one of our leading developers, Andy Vandjick, doesn't have an AMD machine, so he has been trying to make his patches as much CPU-agnostic as possible, and indeed his old AMD kernels for Mountain Lion and Snow Leopard also included support for legacy Intel hardware. Last week, he adapted his patch set for Mavericks, and since he didn't install the necessary new Xcode, i have to build the binaries for him. The resultant kernel didn't work, but brought relevant insights for the current beta kernels for AMD.
Well, knowing Andy's history of enabling legacy Intel support for his kernels, and also knowing he has been using essentially the same base patch set across OSX iterations, i decided to experiment with his kernel, even a little skeptical - since it didn't met its goals, that is, boot on AMD. Then, today, for my greatest surprise, after a few attempts, it worked, and i manage to install mavericks on my 1201n!
I didn't do many things with my Mavericks partition since then, and i expect all iCloud-based services not to be working, since that's the rule with kernels compiled from the XNU sources, but hey!, that's a real deal! Hope you all try it! Here's our kernel: