Although Google does a fine job of locating WordPress content (especially if you alt tag everything and categorize properly) there are other ways to find what’s up on blogs:
Track What Bloggers are Saying – Bill’s Buzz Marketing Blog – ECNext

Blogpulse is an AC Nielsen service with a simple interface and some trending reports.IceRocket searches not only blogs by MySpace as well, another CGM channel that deserves monitoring. IceRocket also offers a trending tool.

Technorati often uncovers blogs not picked up by the other engines, but usually returns the fewest results for searches I conduct.

And of course, there’s the small start up known as a Google. Goog’s Blog Search returns the greatest number of results for the searches I’ve conducted and has that oh so friendly and simple Google UI.

This is by no means a comprehensive list- and there are other sites, like Digg, that help you find out what people are talking about, interested in, or posting about.

Most people don’t start at one of these sites for search, they start at a major search engine like Google, but, times change, and it never hurts to be aware of what’s out there.

Remember, Search Engines don’t all index the same thing- or give the same results, so it never hurts to have many of them available for different searches.