Kismet v2009-11-R1 released
Kismet is an 802.11 layer2 wireless network detector, sniffer, and intrusion detection system. Kismet will work with any wireless card which supports raw monitoring (rfmon) mode, and can sniff 802.11b, 802.11a, and 802.11g traffic.
Kismet identifies networks by passively collecting packets and detecting standard named networks, detecting (and given time, decloaking) hidden networks, and infering the presence of nonbeaconing networks via data traffic.
Release includes fixes to crashes on resizing terminals, tweaks to plugins, addition of the autowep plugin, improved plugin handling, plugin support on OSX, initial support for Snow Leopard, fixes to PPI corruption, XML fixes, and quite a lot of other bugfixes.
More information: Documentation