There are some interesting discussions about the loss of raw socket support in the new Windows XP SP2.
Dominick Baier, Ian Griffiths, and Dana Epp are understandably upset, especially in regards to the nmap security tool.
Michael Howard gives a little more info on what raw sockets support is and isn't left after XP SP2 is installed.
And, Dana provides a patch to get nmap working again under XP SP2.
