A blog for bloggers
If you're interested in the new tools, techniques and approaches available for kitting up a blog, I can't strongly enough recommend Fred Wilson's blog: A VC. Over the last year, in addition to writing really compelling pieces about the web and business, Fred has turned his blog into a public lab. He tests things so you don't have to.
Even if you have no desire to start a company or go public one day, you'll learn something.