[ArtWilliams]

Here is my list which admittedly contains duplucates:

http://rpc.technorati.com/rpc/ping
http://api.feedster.com/ping
http://api.moreover.com/ping
http://api.moreover.com/RPC2
http://api.my.yahoo.com/RPC2
http://api.my.yahoo.com/rss/ping
http://bblog.com/ping.php
http://blog.goo.ne.jp/XMLRPC
http://coreblog.org/ping/
http://ping.blo.gs/
http://ping.bloggers.jp/rpc/
http://ping.feedburner.com
http://ping.syndic8.com/xmlrpc.php
http://ping.weblogalot.com/rpc.php
http://ping.weblogs.se/
http://rpc.blogrolling.com/pinger/
http://rpc.icerocket.com:10080/
http://rpc.pingomatic.com/
http://rpc.technorati.com/rpc/ping
http://rpc.weblogs.com/RPC2
http://topicexchange.com/RPC2
http://www.a2b.cc/setloc/bp.a2b
http://www.bitacoles.net/ping.php
http://www.blogdigger.com/RPC2
http://www.blogpeople.net/servlet/weblogUpdates
http://www.blogs-list.com/xmlrpc.php
http://www.blogshares.com/rpc.php
http://www.blogsnow.com/ping
http://www.blogstreet.com/xrbin/xmlrpc.cgi
http://www.popdex.com/addsite.php
http://www.pudcat.com/milf_mature/
http://www.weblogues.com/RPC/
http://xping.pubsub.com/ping/