I strongly dis agree here.... you need to add the list below into your wordpress panel admin - just click on writting and scroll down till you see Remote Publishing then copy paste the list and add them into your blog ..... am serious here it helps big time ... ad these here ... api.feedster.com/ping api.moreover.com/RPC2 api.moreover.com/ping api.my.yahoo.com/RPC2 api.my.yahoo.com/rss/ping bblog.com/ping.php bitacoras.net/ping blog.goo.ne.jp/XMLRPC blogdb.jp/xmlrpc blogmatcher.com/u.php bulkfeeds.net/rpc coreblog.org/ping/ mod-pubsub.org/kn_apps/blogchatt lasermemory.com/lsrpc/ ping.amagle.com/ ping.bitacoras.com ping.blo.gs/ ping.bloggers.jp/rpc/ ping.cocolog-nifty.com/xmlrpc ping.blogmura.jp/rpc/ 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/ ping.blogoon.net/ ping.blogs.yandex.ru/RPC2 ping.fc2.com/ ping.exblog.jp/xmlrpc ping.feedburner.com ping.myblog.jp ping.rootblog.com/rpc.php ping.syndic8.com/xmlrpc.php ping.weblogalot.com/rpc.php ping.weblogs.se/ pingoat.com/goat/RPC2 rcs.datashed.net/RPC2/ rpc.blogbuzzmachine.com/RPC2 rpc.blogrolling.com/pinger/ rpc.icerocket.com:10080/ rpc.newsgator.com/ rpc.pingomatic.com rpc.technorati.com/rpc/ping rpc.weblogs.com/RPC2 topicexchange.com/RPC2 trackback.bakeinu.jp/bakeping.php a2b.cc/setloc/bp.a2b bitacoles.net/ping.php blogdigger.com/RPC2 blogoole.com/ping/ blogoon.net/ping/ http://coreblog.org/ping http://www.lasermemory.com/lsrpc/ http://mod-pubsub.org/kn_apps/blogchatt http://www.mod-pubsub.org/kn_apps/blogchatter/ping.php http://www.newsisfree.com/xmlrpctest.php http://ping.amagle.com/ http://ping.bitacoras.com http://ping.blo.gs/ http://ping.bloggers.jp/rpc/ http://ping.blogmura.jp/rpc/ http://ping.cocolog-nifty.com/xmlrpc http://ping.exblog.jp/xmlrpc http://ping.feedburner.com http://ping.myblog.jp http://ping.rootblog.com/rpc.php http://www.weblogalot.com/Ping/ http://ping.syndic8.com/xmlrpc.php http://ping.weblogalot.com/rpc.php http://ping.weblogs.se/ http://pinger.blogflux.com/rpc http://pingoat.com/goat/rpc2 http://ping.namaan.net/rpc http://ping.snap.com/ping/RPC2 http://ping.syndic8.com/xmlrpc.php http://ping.weblogalot.com/rpc.php http://ping.wordblog.de/ http://r.hatena.ne.jp/rpc rpc.bloggerei.de/ping/ rpc.reader.livedoor.com/ping http://rpc.blogrolling.com/pinger/ http://rpc.icerocket.com:10080/ http://rpc.pingomatic.com/ http://rpc.blogbuzzmachine.com/RPC2 http://rpc.blogrolling.com/pinger/http://www.snipsnap.org/RPC2 http://trackback.bakeinu.jp/bakeping.php http://topicexchange.com/RPC2 http://www.weblogues.com/RPC/ http://xping.pubsub.com/ping/ http://xmlrpc.blogg.de/ http://bblog.com/ping.php http://blogbot.dk/io/xml-rpc.php http://www.catapings.com/ping.php http://effbot.org/rpc/ping.cgi http://thingamablog.sourceforge.net/ping.php http://rpc.pingomatic.com/ http://rpc.technorati.com/rpc/ping http://rpc.technorati.jp/rpc/ping http://rpc.weblogs.com/RPC2 http://topicexchange.com/RPC2 http://www.blogdigger.com/RPC2 http://www.popdex.com/addsite.php http://xping.pubsub.com/ping http://1470.net/api/ping http://blog.goo.ne.jp/XMLRPC http://blogdb.jp/xmlrpc http://blogmatcher.com/u.php http://bulkfeeds.net/rpc http://coreblog.org/ping/ http://mod-pubsub.org/kn_apps/blogchatt http://www.lasermemory.com/lsrpc/ http://ping.cocolog-nifty.com/xmlrpc http://rcs.datashed.net/RPC2/ http://rpc.newsgator.com/ http://www.a2b.cc/setloc/bp.a2b http://www.blogpeople.net/servlet/weblogUpdates http://www.blogroots.com/tb_populi.blog?id=1 http://www.blogshares.com/rpc.php http://www.blogstreet.com/xrbin/xmlrpc.cgi http://www.mod-pubsub.org/kn_apps/blogchatter/ping.php http://www.newsisfree.com/RPCCloud http://www.newsisfree.com/xmlrpctest.php http://www.popdex.com/addsite.php http://search.yahooapis.com/SiteExplorerService/V1/ping http://blogpeople.net/servlet/weblogUpdates
I think All in One SEO plug in allows the most flexibility and ease of use out of all of the ones I've tried. My second choice would be Head Space.
You paste that huge list onto your blog, it will run like a 3 legged donkey on valium. A better alternative would just be to optimize each post using the free seopressor clone from bloggerhigh.com