In preparation for a Cyber War, ammo supply is critical. Put simply, whoever has the largest number of vulnerabilities (unpatched, of course), and has turned them into exploits, will win. There's a lot of evidence that the United States and China have both compiled large arsenals, and tested a lot of their stuff. Other countries are players as well, but the US and China appear to be the superpowers of Cyber War.
In the United States, some police agencies have been known to at least open up communications channels with Internet criminals. If only for intelligence purposes. But in wartime, offers of employment might be made as well.
