http://mass-ping.com
http://bulkping.com
http://pingler.com
http://just-ping.com/
http://www.pingfarm.com/
http://www.iwebtool.com/ping
http://www.blogpingtool.com/
http://seo.nuansaiklan.com/ping/
http://www.pingoat.com
http://www.alles-over.com/ping-service/?lang=en
http://pingsalot.com/...