Examining the (considerable) changes in ARM support in kernel 3.7-rc1, and the first bits for support of the Raspberry Pi’s Broadcom BCM2835 CPU are there!     Not usable yet, as there is very limited functionality, and the rest of the SoC (System on a Chip) features are not yet there, but it is a start, and will ensure that the device is supported officially in the future..

More info here:

http://lists.infradead.org/pipermail/linux-rpi-kernel/2012-October/thread.html