BackTrack4 beta irc release released 10 seconds ago!!!!
(12:25:54 AM) muts has changed the topic to: http://backtrack4.blogspot.com/ | http://www.remote-exploit.org/cgi-bin/fileget?version=bt4-beta-iso | http://www.remote-exploit.org/cgi-bin/fileget?version=bt4-beta-vm
that would be enough 
for whoever knows what it is