Several people have written to let us know that Dancho Danchev has updated his blog with new data on the IFRAME SEO poisoning attacks.  In short, he finds that the attacks are ongoing and bigger websites are being used.  Read the blog entry here: http://ddanchev.blogspot.com/2008/03/massive-iframe-seo-poisoning-attack.html

Handler Kevin Liston covered this previously on May 15: http://isc.sans.org/diary.html?storyid=4144