Google dumps all 11+ million .co.cc sites from its results
theregister.co.uk
theregister.co.uk
EDIT: okay so I've just been told "robots.txt". Didn't thought of that, heh.
Whilst I appreciate less spam in my Google results, and I certainly appreciate more safety when browsing search results, I'm not sure I like the idea of the whole registrar being blocked en-mass.