The wr702 will never be properly supported by OpenWrt/piratebox. The reason for this is it simply doesn't have enough ram and flash memory to run properly.
[wiki.openwrt.org]
If you buy a chinese langauge wr703 it is fine, because you are going to flash it with a different (and english) firmware anyway.
[wiki.openwrt.org]
If you buy a chinese langauge wr703 it is fine, because you are going to flash it with a different (and english) firmware anyway.