Does the bridged network adapter not support promiscuous mode within a VM? Running etherape or ethereal under any of the distributions I have installed results in only being able to see local traffic, basically anything in my direct 10.0.0.x subnet. Running ethereal on the host machine via Darwinports I can see all traffic so I know the mac is able to see everything. Is there some kind of filtering going on in the Parallels network bridging?