update:Oooh, nasty. Remember to nuke those flash cookies, boys & girls.
>I just us a badge from addthis.com
Suit: Clearspring Violates Consumer Privacy on Disney, Warner Brothers Sites "According to the suit, Clearspring targets web surfers who visit affiliate sites and sets a tracking device in those users' Flash players. According to the suit, when users try to clear their browser cookies, the Flash player restores them, allowing Clearspring to "harvest ... consumers['] personal information for online marketing activities."
http://www.consumeraffairs.com/news04/2010/08/clearspring.html=============
It was apparently the AddThis tool that was doing the dirty work. I can never bring myself to trust hosted apps and I never installed it on my sites.
"Clearspring makes the ubiquitous AddThis tool, which enables users to share links via e-mail or social-networking sites. According to the report from Berkeley, Clearspring has resurrected cookies for AOL.com, Answers.com, and Mapquest.com."
http://news.cnet.com/8301-31001_3-20013672-261.html