Microsoft has introduced a new socket option in their Winsock framework, which is called SO_EXCLUSIVEADDRUSE. From the explanation, it doesn't get very clear what the advantage of this option is over binding to a specific IP and not using any options at all.
It appears that the only purpose of this option is to use Fear, Uncertainty and Doubt (the DoS story) to make people believe that they should use this option. This again makes their code incompatible with the POSIX API.
More can be found on http://msdn2.microsoft.com/en-us/library/ms740618.aspx.