Today I came across a ping tool that works well with wordpress that I thought I would pass along. It is called Feed Shark and it is free to use however it does require a link back to them on your site so it may not be the solution for you.

It has three categories:

Services that accept blogs:

Daypop
Technorati
Bloogz
Blog Census
Blo.gs
IceRocket
Read A Blog
FeedBurner
Google
BlogRolling
focusLook
Weblogs.com
Alexa
GeoURL
Gnoos
Adoppt
Twingly
Infotiger
whatUseek
Cipinet
Burf
FyberSearch
Walhello
Acoon
HopHunt
Super.info
AskPeter
Myahint
Semager
Livedoor
Gnibo
Search-o-rama

Blogdigger
NewsMob
Bulkfeeds
NgoidObjects
SearchFeed
Directory
Postami
Feed24
FeedsFarm
Golden Feed
FeedFuryFeedPlex
Moreover
Yahoo!
WASALive
Feedgy

AllPodcasts
Get A Podcast
YouLoud
Podscope
Odeo
Pluggd
PodLounge
Podcast Like That
Mefeedia
Speecha
Fluctu8
Replay Video
Podcast Fusion
Podcast.com

If you aren’t sure what ping can do for you or how to use it then you should check out this page on wordpress.org for an excellent guide on using ping with your wordpress blog.