Which interfaces can be bridged on the routerboard (wired & wireless)? I'm not an expert in this, so maybe some additional clarification would be helpful.
MAC level bridging of Ethernet, Ethernet over IP (EoIP), WDS, Prism, Atheros and RadioLAN interfaces is supported.
All 802.11b and 802.11a client wireless interfaces (both ad-hoc and infrastructure or station modes) do not support bridging. use EoIP to bridge such interfaces.