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 Continue reading →