http://rpc.weblogs.com/RPC2
http://rpc.feedsky.com/ping
http://www.feedsky.com/api/RPC2
http://api.moreover.com/RPC2
http://rpc.icerocket.com:10080/
http://api.feedster.com/ping.php
http://www.syndic8.com/xmlrpc.php
http://ping.weblogalot.com/rpc.php
http://rpc.technorati.com/rpc/ping