Update Your Ping List (Too Many Ping List is Bad)
I've researched about his and found out about this: WordPress Compressed All-Inclusive Ping List at WordPress Compressed All-Inclusive Ping List Software ReviewInstant Info Online
It appears that most ping services only accepts ping coming from pingomatic directly so having a huge list in your Wordpress will actually work against you. Here's what they recommend that you only use:
http://rpc.pingomatic.com http://www.blogpeople.net/servlet/weblogUpdates http://ping.myblog.jp http://ping.bloggers.jp/rpc/ http://bblog.com/ping.php
Free - Another Automated Blog Tactic (Even Easier Than Before)
Free - Turn any WordPress blog into a "stealth squeeze" machine with these free plugins
>>> Plus "Other Stuff" I've posted here on Warrior Forum.