hi,
the first post was only to figure out if someone has this thing working
and may mail me his/her config.xml and hardware used

so you need more info

i dont have a working setup on 1.0 for this purpose.
the m0n0 i´m running now is 1.0 with an external ap that does the dhcp, thats fine but not captive.

i try to build a m0n0 1.1 based public ap with generic old pc (fsc pIII 700, 256mb ram, 64mb doc)
an netgear ma311 (intersil prism chip) dhcp enabled on this and two intel pro 100b nic´s.

the thing works fine when bridging wireless to lan but only one time dhcp works
and if i enable bridge filtering nothing works even with   
any  to any 
rules for all interfaces nothing is moving the dhcp also stops working

without bridging wireless to lan dhcp did it also only one time