Si quieres hacer un ping aquí tienes una buena lista:

• api.moreover.com/RPC2
• api.my.yahoo.co.jp/RPC2
• api.my.yahoo.com/RPC2
• audiorpc.weblogs.com/RPC2
• blog.goo.ne.jp/XMLRPC
• blogpeople.net/ping
• blogsearch.google.ae/ping/RPC2
• blogsearch.google.at/ping/RPC2
• blogsearch.google.be/ping/RPC2
• blogsearch.google.bg/ping/RPC2
• blogsearch.google.ca/ping/RPC2
• blogsearch.google.ch/ping/RPC2
• blogsearch.google.cl/ping/RPC2
• blogsearch.google.co.cr/ping/RPC2
• blogsearch.google.co.hu/ping/RPC2
• blogsearch.google.co.id/ping/RPC2
• blogsearch.google.co.il/ping/RPC2
• blogsearch.google.co.in/ping/RPC2
• blogsearch.google.co.it/ping/RPC2
• blogsearch.google.co.jp/ping/RPC2
• blogsearch.google.co.ma/ping/RPC2
• blogsearch.google.co.nz/ping/RPC2
• blogsearch.google.co.th/ping/RPC2
• blogsearch.google.co.uk/ping/RPC2
• blogsearch.google.co.ve/ping/RPC2
• blogsearch.google.co.za/ping/RPC2
• blogsearch.google.com.ar/ping/RPC2
• blogsearch.google.com.au/ping/RPC2
• blogsearch.google.com.br/ping/RPC2
• blogsearch.google.com.co/ping/RPC2
• blogsearch.google.com.do/ping/RPC2
• blogsearch.google.com.mx/ping/RPC2
• blogsearch.google.com.my/ping/RPC2
• blogsearch.google.com.pe/ping/RPC2
• blogsearch.google.com.sa/ping/RPC2
• blogsearch.google.com.sg/ping/RPC2
• blogsearch.google.com.tr/ping/RPC2
• blogsearch.google.com.tw/ping/RPC2
• blogsearch.google.com.ua/ping/RPC2
• blogsearch.google.com.uy/ping/RPC2
• blogsearch.google.com.vn/ping/RPC2
• blogsearch.google.com/ping/RPC2
• blogsearch.google.de/ping/RPC2
• blogsearch.google.es/ping/RPC2
• blogsearch.google.fi/ping/RPC2
• blogsearch.google.fr/ping/RPC2
• blogsearch.google.gr/ping/RPC2
• blogsearch.google.hr/ping/RPC2
• blogsearch.google.ie/ping/RPC2
• blogsearch.google.in/ping/RPC2
• blogsearch.google.it/ping/RPC2
• blogsearch.google.jp/ping/RPC2
• blogsearch.google.lt/ping/RPC2
• blogsearch.google.nl/ping/RPC2
• blogsearch.google.pl/ping/RPC2
• blogsearch.google.pt/ping/RPC2
• blogsearch.google.ro/ping/RPC2
• blogsearch.google.ru/ping/RPC2
• blogsearch.google.se/ping/RPC2
• blogsearch.google.sk/ping/RPC2
• blogsearch.google.tw/ping/RPC2
• blogsearch.google.us/ping/RPC2
• feedsky.com/api/RPC2
• hamo-search.com/ping.php
• holycowdude.com/rpc/ping/
• http://1470.net/api/ping
• http://api.feedster.com/ping
• http://api.feedster.com/ping.php
• 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://bitacoras.net/ping
• http://blo.gs/ping.php
• http://blog.goo.ne.jp/XMLRPC
• http://blogdb.jp/xmlrpc
• http://blogmatcher.com/u.php
• http://blogoole.com/ping
• http://blogroots.com/tb_populi.blog?id=1
• http://blogsearch.google.com/ping/RPC2
• http://blogsnow.com/ping
• http://bulkfeeds.net/rpc
• http://coreblog.org/ping
• http://coreblog.org/ping/
• http://geourl.org/ping
• http://godesigngroup.com
• http://godesigngroup.com/blog/feed
• http://imblogs.net/ping
• http://ipings.com
• http://lasermemory.com/lsrpc
• http://mod-pubsub.org/kn_apps/blogchatt
• http://ping.amagle.com
• http://ping.amagle.com/
• http://ping.bitacoras.com
• http://ping.blo.gs
• http://ping.blo.gs/
• http://ping.blogg.de
• http://ping.bloggers.jp/rpc
• http://ping.blogmura.jp/rpc
• http://ping.blogmura.jp/rpc/
• http://ping.cocolog-nifty.com/xmlrpc
• http://ping.exblog.jp/xmlrpc
• http://ping.fakapster.com/rpc
• http://ping.feedburner.com
• http://ping.myblog.jp
• http://ping.rootblog.com/rpc.php
• http://ping.syndic8.com/xmlrpc.php
• http://ping.weblogalot.com/rpc.php
• http://ping.weblogs.se
• http://ping.weblogs.se/
• http://ping.wordblog.de
• http://pinger.blogflux.com/rpc
• http://pingoat.com/goat/RPC2
• http://pingqueue.com/rpc
• http://popdex.com/addsite.php
• http://rcs.datashed.net/RPC2
• http://rcs.datashed.net/RPC2/
• http://rpc.blogbuzzmachine.com/RPC2
• http://rpc.blogrolling.com/pinger
• http://rpc.blogrolling.com/pinger/
• http://rpc.britblog.com
• http://rpc.icerocket.com:10080
• http://rpc.icerocket.com:10080/
• http://rpc.newsgator.com
• http://rpc.newsgator.com/
• http://rpc.pingomatic.com
• http://rpc.pingomatic.com/
• http://rpc.tailrank.com/feedburner/RPC2
• http://rpc.technorati.com/rpc/ping
• 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://thingamablog.sourceforge.net/ping.php
• http://topicexchange.com/RPC2
• http://trackback.bakeinu.jp/bakeping.php
• http://weblogues.com/RPC
• http://www.a2b.cc/setloc/bp.a2b
• http://www.bitacoles.net/ping.php
• http://www.blogdigger.com/RPC2
• http://www.blogoole.com/ping
• http://www.blogoole.com/ping/
• http://www.blogoon.net/ping
• http://www.blogoon.net/ping/
• http://www.blogpeople.net/servlet/weblogUpdates
• http://www.blogroots.com/tb_populi.blog?id=1
• 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.feedsubmitter.com
• http://www.focuslook.com/ping.php
• http://www.godesigngroup.com
• http://www.holycowdude.com/rpc/ping
• http://www.imblogs.net/ping
• http://www.lasermemory.com/lsrpc
• http://www.lasermemory.com/lsrpc/
• http://www.mod-pubsub.org/kn_apps/blogchatter/ping.php
• http://www.newsisfree.com/RPCCloud
• http://www.newsisfree.com/xmlrpctest.php
• http://www.pingerati.net
• http://www.pingmyblog.com
• http://www.popdex.com/addsite.php
• http://www.snipsnap.org/RPC2
• http://www.weblogalot.com/ping
• http://www.weblogues.com/RPC
• http://www.weblogues.com/RPC/
• http://xmlrpc.blogg.de
• http://xmlrpc.blogg.de/
• http://xping.pubsub.com/ping
• http://xping.pubsub.com/ping/
• newsblog.jungleboots.org/ping.php
• ping.blogoon.net/
• ping.blogs.yandex.ru/RPC2
• ping.fc2.com/
• ping.feedburner.com/
• ping.kutsulog.net/
• ping.myblog.jp/
• ping.namaan.net/rpc
• ping.snap.com/ping/RPC2
• ping.syndic8.com/xmlrpc.php
• ping.weblogalot.com/rpc.php
• ping.wordblog.de/
• r.hatena.ne.jp/rpc
• rpc.bloggerei.de/ping/
• rpc.blogrolling.com/pinger/
• rpc.icerocket.com:10080/
• rpc.pingomatic.com
• rpc.reader.livedoor.com/ping
• rpc.technorati.com/rpc/ping
• rpc.technorati.jp/rpc/ping
• rpc.twingly.com/
• rpc.weblogs.com/RPC2
• wasalive.com/ping/
• www.blogpeople.net/servlet/weblogUpdates
• xmlrpc.blogg.de
• xping.pubsub.com/ping/
• zhuaxia.com/rpc/server.php