One idea I've been debating on figuring out how to achieve for some time is patching the framebuffer for our first-generation Intel HD Graphics on-the-fly. Certain bootloaders, like Clover and XPC, support this. The added benefit of this is that as long as the framebuffer patches remain the same (I assume this only applies to updates, like from 10.9 to 10.9.1, rather than upgrades, like from 10.8.5 to 10.9), we won't have to re-patch or roll back older kexts. The patch will happen seamlessly by the bootloader.
The patches work by find and replace as opposed to offsets, so I assume that such an endeavor will require Mavericks. I know giofrida posted some patches a while back in this thread (back when it was still in DP), but I don't think those patches worked. Giofrida, could you could send me the patches you currently use for your patching app for me to test? Thanks in advanced!!
P.S. - If anyone could pass along a hex difference in the patch for Mountain Lion's framebuffer to try out, that, too would be greatly appreciated!
Edit: Sorry for posting same content twice; a networking error happened on my end!