For usage go to WordPress Admin > Settings > Writing > Update Services, and paste the list of ping services below:
http://rpc.twingly.com http://api.feedster.com/ping http://api.moreover.com/RPC2 http://api.moreover.com/ping http://www.blogdigger.com/RPC2 http://www.blogshares.com/rpc.php http://www.blogsnow.com/ping http://www.blogstreet.com/xrbin/xmlrpc.cgi http://bulkfeeds.net/rpc http://www.newsisfree.com/xmlrpctest.php http://ping.blo.gs/ http://ping.feedburner.com http://ping.syndic8.com/xmlrpc.php http://ping.weblogalot.com/rpc.php http://rpc.blogrolling.com/pinger/ http://rpc.technorati.com/rpc/ping http://rpc.weblogs.com/RPC2 http://www.feedsubmitter.com http://blo.gs/ping.php http://www.pingerati.net http://www.pingmyblog.com http://geourl.org/ping http://ipings.com http://www.weblogalot.com/ping http://rpc.pingomatic.com/ http://blogsearch.google.com/ping/RPC2 http://ping.feedburner.com http://rpc.blogbuzzmachine.com/RPC2 http://rpc.weblogs.com/RPC2 http://ping.fc2.com/ http://blogs.yandex.ru/ http://rpc.bloggerei.de/ 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.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.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.de/ping/RPC2 http://blogsearch.google.es/ping/RPC2 http://blogsearch.google.fi/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.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.us/ping/RPC2 http://ping.blogs.yandex.ru/RPC2 http://ping.rss.drecom.jp/ http://rpc.bloggerei.de/ping/ http://rpc.odiogo.com/ping/ http://rpc.weblogs.com/RPC2 http://blog.goo.ne.jp/XMLRPC http://mod-pubsub.org/kn_apps/blogchatt http://ping.amagle.com/ http://ping.bloggers.jp/rpc/ http://ping.exblog.jp/xmlrpc http://ping.weblogalot.com/rpc.php http://www.blogdigger.com/RPC2