Give me 1 good reason to blog

Inspired by a tweet from CC who was giving a devil's advocate presentation on reasons why *not* to blog and a blog called 1 good reason, I thought I'd take the opposite position.

Give me 1 good reason why anyone (a company, organization, brand or individual) should blog.

You know all too well the typical skeptical client or boss; the naysayer who talks with complete authority, sweeping generalizations and broad strokes of certainty; the bully who puts you on the spot, the back foot and forces you into a corner where you need to come out swinging or risk getting pummeled to the canvas.

Now at least you can fight back.

Hopefully this list can provide a deep and meaningful litany of support, proof points and strategic rationale for anyone thinking - or not thinking - about the benefits and advantages of blogging.

Who wants to start?