Interview with Mark Cuban, owner of the Dallas Mavericks: if you are looking to do [a blog] as a business, unless you already have something that you're selling -- and this is just a complement -- then don't do it. This is not a way to make money. [...]
But if you are in corporate America, if you are a public figure, it's a way for you to communicate about what you're doing in your organization as if you're a columnist in a major, you know, media publication.