very extensive and cleaned ping list here: http://journalxtra.com/2011/05/wordpress-ping-list-updated/ recommends installing CBNet Ping Optimizer http://wordpress.org/extend/plugins/cbnet-ping-optimizer/ Journal Xtra’s Ping List that i’m using. no Adult Sites: http://rpc.pingomatic.com http://ping.weblogs.se/ http://blogmatcher.com/u.php http://coreblog.org/ping/ http://www.blogpeople.net/servlet/weblogUpdates http://bulkfeeds.net/rpc http://trackback.bakeinu.jp/bakeping.php http://ping.myblog.jp http://ping.bitacoras.com http://ping.bloggers.jp/rpc/ http://ping.blogmura.jp/rpc/ http://xmlrpc.blogg.de http://1470.net/api/ping http://bblog.com/ping.php http://blog.goo.ne.jp/XMLRPC http://rpc.pingomatic.com