I got a chance to take a closer look at the problems with Linux 2.6.26-rc1(-git) and put together a preliminary patch (see below) that resolves the problems I'm aware of. Please note that this patch is experimental, use it at your own risk (if in doubt, please use a stable kernel release until Linux 2.6.26 is released and an NVIDIA graphics driver with support for it has been released).
Please see e.g. http://www.nvnews.net/vbulletin/showthread.php?t=110088
for information on how to apply patches to .run