After every post you make on your blog, wordpress will ping some online services telling them that you have made a new post (like ping o matic). So, users from these services will know that you updated your blog, and bringing you possible visitors
The default ping service that wordpress uses is not enough. So i gathered some ping services over the time and now i want to share with you them.
The services that im currently using are:
http://bitacoras.net/ping
http://www.a2b.cc/setloc/bp.
http://www.bitacoles.net/ping.php
http://blogbot.dk/io/xml-rpc.php
http://www.blogdigger.com/RPC2
http://www.blogoole.com/ping/
http://www.blogoon.net/ping/
http://www.blogpeople.net/servlet/weblogUpdates
http://www.blogroots.com/tb_populi.blog?id=1