All of the the swarms of trackback spam seemed to last an hour give or take a few minutes, so it does look kind of like “rent-a-bot” activity, lots of different IP addresses, trackback spam sites seem to have a common theme – the last batch was insurance type sites…. a sampling of about three or four found that they were all cloaked redirects for the same site/page …. http://www.finance-portal-online.com/insurance.php ALL are registered with moniker.com and all the insurance related domains being spammed (that I checked) redirect to the finance-portal-online.com site above which is registered to a “Bill Bilton” whose email is given as bill at top-support.net ….