The Raspberry Pi 3.6.y kernel branch in GitHub at https://github.com/raspberrypi/linux/tree/rpi-3.6.y has now been updated to version 3.6.6, and compiles cleanly, with a couple of small gotchas..

I have the wireless drivers selected, and for some reason one of the header files is missing – /drivers/net/wireless/hostap/hostap_common.h..   It is a simple job to just copy this file over from the ‘standard’ 3.6.6 kernel tree, if you need it (and not everyone will!).

I am still getting WARNING: …………… /lib/modules/3.6.6-pi/kernel/net/bluetooth/rfcomm/rfcomm.ko needs unknown symbol tty_port_init messages, but the kernel compiles OK, and – for the time being – I am just ignoring them..

Fedora release 17 (Beefy Miracle)
Kernel 3.6.6-pi on an armv6l (ttyAMA0)
…………………….
$ uname -a
Linux rgpi 3.6.6-pi #1 Thu Nov 15 22:32:42 GMT 2012 armv6l armv6l armv6l GNU/Linux

Robert Gadsdon.  November 15th 2012.