The use of good keywords, just as in any search for information, is the ticket to finding good results. Tagging your blog posts, your saved pictures, your saved links, and your main blog all are important if you want to be found and/or organize your information assets for efficient and easy use. We'll learn more about tagging as we get into using some of the information gathering and saving tools. Technorati is a good tool to practice your tag search abilities and to explore the blogosphere.
With, literally, millions of blogs out there, evaluation is one of the most important skills we can develop and teach (for any type of information). Technorati serves this purpose in that you can determine what kind of "respect level" the blogger has earned from other bloggers and peers. For serious bloggers, Technorati has been able to provide key data regarding the popularity of your blog, the authority of your blog, and useful statistics. Many blogging providers now provide these features as part of their blogging service.
All in all, I still use Technorati from time to time to investigate statistics and find some of the biggest and most viewed blogs. The "What's percolating in blogs now" feature is always a good way to find out the big news items being posted.