So implementing this would be pretty easy from the technical side.
Gather log info from companies running Web servers.
We are developing services to do just this. The system, however, could also be used to produce agregated information - given the cooperation of some participating sites, of course. If you, or anyone else in the list, are interested in becoming a beta tester, please let me know. This is a fake email address. So many old members of this list were getting spam generated from siphons trolling the archives that I replaced all email addresses with randomly generated spam traps that forward mail to spam fighters.