m0n0wall Forum - Spanning tree, and spanning tree over wireless?

I have numerous soekris net4801 devices here. Each one has two miniPCI atheros wifi cards in them, one via a PCI to miniPCI adapter. What I want to do is connect all of these boards together, in what will eventually be a ring/mesh network. Meaning that I need spanning tree enabled. I also would really like to use the 2nd wifi card on each board as a redundant radio link to a certain other soekris board.

I have this set up on a custom linux build at the moment, so I know what settings worked there, but the software isn't quite stable at the moment.
The first wifi card should act as a regular access point. Nothing special really, except it needs WDS enabled. The second one, however, is a client. I want to also use WPA-PSK, so I need to run wpa_supplicant (I think? I'm used to linux here). I run wpa_supplicant with the -b option to specify a bridge under linux, and also specify a bssid in the wpa_supplicant.conf file.

So, my question is, does m0n0wall support wireless client devices, and does it support bridging them while using WPA-PSK security? And does m0n0wall bridging use the spanning tree protocol?