NOTE: Superceded by openwrt/openwrt#2655
The issue on persisting data to flash is resolved by the patches to spi-nor.c in that PR.
Mostly works, but I can't get changes to persist to flash, so settings are lost on reboot. Looking in dmesg there's some jffs2 issues that I can't work out.
Use the brcmsmac driver for wireless support, delete all references to the b43 driver, or you will end up with at best only 802.11g support instead of 802.11n.