Many folks choose to use the Pingomatic to ensure that when the post a blog entry, as many search indexes such as Technorati and Feedburner.
however, what I find interesting is that there are a large number of “dead” services in the list of indexes pinged. For instance, Pubsub is listed and they’ve been dead for over a year or so. They don’t even exist anymore.
Notably absent is Google Blog Search which is quickly becoming the indexing engine of choice over competitors like Technorati. It would be nice if this property could be updated to ping reasonably productive sites.
For those pinging at home, make sure you add the Google ping server to your ping options: http://blogsearch.google.com/ping/RPC2. You can add this in your WordPress admin Options > Writing panel.