The blog frequently cited as the best corporate blog out there is the one run by Google. The blog search engine Technorati, for example, ranks the Google blog as the number one most popular corporate site. Since Google searches for and categorizes everything in the known Internet world, the blog is at liberty to discuss most anything connected with the Web. They'll talk about anything from cloud computing to tracking the swine flu.
One interesting thing about the blog is that it's not easily detectable from Google's home page. You sort of have to go looking for it. Another interesting aspect is that it uses Blogger, the same free blog-hosting service we use here at Triton News. But that's not so surprising, since Blogger is an arm of Google.
Of course, Google has a whole army of employees ready and willing to write blog posts for it, and the entire Internet at its fingertips. And everyone and their uncle goes to Google to look up stuff every single day. So no one should feel too bad if their own blog doesn't measure up to Google's. There's plenty of room for the little guy, too.