Ah cool. I've got the magic cookie for Google's SearchWiki.
This lets me move URLs up the search or delete them entirely (perhaps I could take out all the Aussie sites from British search results?). I can also leave public comments about sites.
Of course, I need to be careful here; as part of the UK's Unfair Trading regulations act if I leave a positive note on a client's site I can't give the impression I'm an average Joe happy customer.