Partial NB604N support
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.
Updating the flash via LuCi also doesn't work, I always have to use the CFE web updater instead.
See also NB604N on OpenWRT wiki