Every time you post an entry, you want the world to know. If you tell it to do so, the WordPress engine will notify several site update services with a ping to let them know that there’s something new on your site. On the “Settings” panel, at the bottom of the “Write” tab, there is a section labeled Update Services. By default there are a few services listed here, but if you take a minute to add some other popular ones, you should see a nice little traffic increase.
Here are the update services I ping every time I add a new post:
Previously included in the list but apparently no longer functioning (or no longer operating as ping services):
http://api.feedster.com/ping.php http://api.moreover.com/RPC2 http://api.my.yahoo.com/RPC2 http://rpc.blogrolling.com/pinger/ http://rpc.icerocket.com:10080/ http://xping.pubsub.com/ping/ http://www.blogdigger.com/RPC2 http://www.newsisfree.com/RPCCloud http://www.syndic8.com/xmlrpc.php http://rpc.technorati.com/rpc/ping