Blogs are just a fun tool for posting rants on the web, right? Wrong. Blogs have become much more than that. Professor John Palfrey is using a blog in his Cyberlaw and the Global Economy class. In fact, it's a required part of his class. If you dig a little deeper you'll see that Harvard Law has a LOT of blogs.
Blogs are coming of age. They are used as tools to build community (clubs, schools, churches, etc), they can be used as a help system, content management, and more. If you haven't taken a serious look at blogs, you should start right away.
If you'd like an idea of how many, and how often, weblogs are updated then go to weblogs.com. This site is updated every second, it's amazing!
Happy blogging.