In my travels around the web I have found several ping lists that others use to notify of new posts on their blog. So I have been compiling a list that could be useful for others it includes the recommended ping lists for WordPress.
Another must have ping tool you should have in your arsenal is to register with http://feedshark.brainbliss.com/ which will send out pings, RSS and podcasts.
Click the show button on the ping lists below then select the entire list and copy it. Then got to your Dashboard > Setting > writing and scroll to the bottom of the page where you will find a description for Update Services. In the box below that description past the list then click the save changes button. Then the next time you post an article WordPress will automatically ping all of the address in the list.
Ping List
http://1470.net/api/ping
http://a2b.cc/setloc/bp.a2b
http://api.feedster.com/ping
http://api.moreover.com/ping
http://api.moreover.com/RPC2
http://api.my.yahoo.co.jp/RPC2
http://api.my.yahoo.com/ping
http://api.my.yahoo.com/RPC2
http://api.my.yahoo.com/rss/ping
http://audiorpc.weblogs.com/RPC2
http://bblog.com/ping.php
http://bitacoles.net/notificacio.php
http://bitacoles.net/ping.php
http://bitacoras.net/ping
http://blo.gs/ping.php
http://blog.goo.ne.jp
http://blog.goo.ne.jp/XMLRPC
http://blogbot.dk/io/xml-rpc.php
http://blogdb.jp
http://blogdb.jp/xmlrpc
http://blogdigger.com/RPC2
http://blogmatcher.com/u.php
http://blogoole.com/ping/
http://blogoon.net/ping/
http://blogpeople.net/ping
http://blogroots.com/tb_populi.blog?id=1
http://blogsearch.google.ae/ping/RPC2
http://blogsearch.google.at/ping/RPC2
http://blogsearch.google.be/ping/RPC2
http://blogsearch.google.bg/ping/RPC2
http://blogsearch.google.ca/ping/RPC2
http://blogsearch.google.ch/ping/RPC2
http://blogsearch.google.cl/ping/RPC2
http://blogsearch.google.co.cr/ping/RPC2
http://blogsearch.google.co.hu/ping/RPC2
http://blogsearch.google.co.id/ping/RPC2
http://blogsearch.google.co.il/ping/RPC2
http://blogsearch.google.co.in/ping/RPC2
http://blogsearch.google.co.it/ping/RPC2
http://blogsearch.google.co.jp/ping/RPC2
http://blogsearch.google.co.ma/ping/RPC2
http://blogsearch.google.co.nz/ping/RPC2
http://blogsearch.google.co.th/ping/RPC2
http://blogsearch.google.co.uk/ping/RPC2
http://blogsearch.google.co.ve/ping/RPC2
http://blogsearch.google.co.za/ping/RPC2
http://blogsearch.google.com.ar/ping/RPC2
http://blogsearch.google.com.au/ping/RPC2
http://blogsearch.google.com.br/ping/RPC2
http://blogsearch.google.com.co/ping/RPC2
http://blogsearch.google.com.do/ping/RPC2
http://blogsearch.google.com.mx/ping/RPC2
http://blogsearch.google.com.my/ping/RPC2
http://blogsearch.google.com.pe/ping/RPC2
http://blogsearch.google.com.sa/ping/RPC2
http://blogsearch.google.com.sg/ping/RPC2
http://blogsearch.google.com.tr/ping/RPC2
http://blogsearch.google.com.tw/ping/RPC2
http://blogsearch.google.com.ua/ping/RPC2
http://blogsearch.google.com.uy/ping/RPC2
http://blogsearch.google.com.vn/ping/RPC2
http://blogsearch.google.com/ping/RPC2
http://blogsearch.google.es/ping/RPC2
http://blogsearch.google.fr/ping/RPC2
http://blogsearch.google.gr/ping/RPC2
http://blogsearch.google.hr/ping/RPC2
http://blogsearch.google.ie/ping/RPC2
http://blogsearch.google.in/ping/RPC2
http://blogsearch.google.it/ping/RPC2
http://blogsearch.google.jp/ping/RPC2
http://blogsearch.google.lt/ping/RPC2
http://blogsearch.google.nl/ping/RPC2
http://blogsearch.google.pl/ping/RPC2
http://blogsearch.google.pt/ping/RPC2
http://blogsearch.google.ro/ping/RPC2
http://blogsearch.google.ru/ping/RPC2
http://blogsearch.google.se/ping/RPC2
http://blogsearch.google.sk/ping/RPC2
http://blogsearch.google.tw/ping/RPC2
http://blogsearch.google.us/ping/RPC2
http://blogshares.com/rpc.php
http://blogsnow.com/ping
http://blogstreet.com/xrbin/xmlrpc.cgi
http://blogupdate.org/ping/
http://bulkfeeds.net
http://bulkfeeds.net/rpc
http://bulkfeeds.net/rpc
http://catapings.com/ping.php
http://coreblog.org/ping
http://effbot.org/rpc/ping.cgi
http://feedsky.com/api/RPC2
http://fgiasson.com/pings/ping.php
http://geourl.org/ping
http://hamo-search.com/ping.php
http://holycowdude.com/rpc/ping/
http://imblogs.net/ping/
http://ipings.com
http://lasermemory.com/lsrpc/
http://mod-pubsub.org
http://mod-pubsub.org/kn_apps/blogchatt
http://mod-pubsub.org/knapps/blogchatt
http://mod-pubsub.org/ping.php
http://newsblog.jungleboots.org/ping.php
http://newsisfree.com/RPCCloud
http://packetmonster.net/xmlrpc.php
http://ping.amagle.com
http://ping.bitacoras.com
http://ping.blo.gs/
http://ping.blogg.de/
http://ping.bloggers.jp/rpc
http://ping.blogoon.net/
http://ping.blogs.yandex.ru/RPC2
http://ping.cocolog-nifty.com/xmlrpc
http://ping.exblog.jp/xmlrpc
http://ping.fakapster.com/rpc
http://ping.fc2.com/
http://ping.feedburner.com
http://ping.feeds.yahoo.com/RPC2/
http://ping.kutsulog.net/
http://ping.myblog.jp
http://ping.namaan.net/rpc
http://ping.rootblog.com/rpc.php
http://ping.snap.com/ping/RPC2
http://ping.syndic8.com/xmlrpc.php
http://ping.weblogalot.com/rpc.php
http://ping.weblogs.se
http://ping.wordblog.de/
http://pinger.blogflux.com/rpc
http://pingoat.com/
http://pingoat.com/goat/RPC2
http://pingqueue.com/rpc/
http://popdex.com/addsite.php
http://r.hatena.ne.jp/rpc
http://rcs.datashed.net
http://rcs.datashed.net/RPC2
http://rpc.blogbuzzmachine.com/RPC2
http://rpc.bloggerei.de/ping/
http://rpc.blogrolling.com/pinger/
http://rpc.britblog.com/
http://rpc.icerocket.com:10080
http://rpc.newsgator.com/
http://rpc.pingomatic.com/
http://rpc.reader.livedoor.com/ping
http://rpc.tailrank.com/feedburner/RPC2
http://rpc.technorati.com/rpc/ping
http://rpc.twingly.com
http://rpc.weblogs.com/RPC2
http://rpc.wpkeys.com
http://services.newsgator.com/ngws/xmlrpcping.aspx
http://signup.alerts.msn.com/alerts-PREP/submitPingExtended.doz
http://snipsnap.org/RPC2
http://syndic8.com/xmlrpc.php
http://thingamablog.sourceforge.net/ping.php
http://topicexchange.com
http://topicexchange.com/RPC2
http://trackback.bakeinu.jp/bakeping.php
http://wasalive.com/ping/
http://weblogues.com/ping/
http://weblogues.com/RPC/
http://www.a2b.cc
http://www.a2b.cc/setloc/bp.a2b
http://www.bitacoles.net/ping.php
http://www.blogdigger.com/RPC2
http://www.bloglines.com/ping
http://www.blogoole.com/ping/
http://www.blogoon.net/ping
http://www.blogpeople.net
http://www.blogpeople.net/servlet/weblogUpdates
http://www.blogroots.com
http://www.blogroots.com/tb_populi.blog?id=1
http://www.blogroots.com/tbpopuli.blog?id=1
http://www.blogsdominicanos.com/ping/
http://www.blogshares.com/rpc.php
http://www.blogsnow.com/ping
http://www.blogstreet.com/xrbin/xmlrpc.cgi
http://www.catapings.com/ping.php
http://www.feedsky.com/api/RPC2
http://www.feedsubmitter.com
http://www.holycowdude.com/rpc/ping/
http://www.imblogs.net/ping/
http://www.lasermemory.com
http://www.lasermemory.com/lsrpc
http://www.mod-pubsub.org/kn_apps/blogchatter/ping.php
http://www.mod-pubsub.org/knapps/blogchatter/ping.php
http://www.mod-pubsub.org/ping.php
http://www.newsisfree.com/RPCCloud
http://www.newsisfree.com/xmlrpctest.php
http://www.octora.com/add_rss.php
http://www.pingerati.net
http://www.pingmyblog.com
http://www.popdex.com