hosts sites

http://hosts-file.net/.%5Cad_servers.txt

http://pgl.yoyo.org/adservers/serverlist.php?hostformat=hosts&showintro=1&mimetype=plaintext

http://someonewhocares.org/hosts/hosts

http://winhelp2002.mvps.org/hosts.txt

http://www.malwaredomainlist.com/hostslist/hosts.txt