DMCA works good for sending to the operator of the site, the registrar of the domain, and the hosting company.
If its listed in Google, you can also send a DMCA to them to remove the search listings for the page that contains it
http://www.google.com/dmca.html
An example format for a letter can be found at
http://www.chillingeffects.org/dmca5...?NoticeID=1501