Companies are still wondering if they need to enter into an uncontrolled conversation with their customers. Well, the indicators are all there that this trend is not going away any time soon. (Remember the Cluetrain Manifesto, way back when in 2000? An earlier indication of this trend, perhaps even the tipping point.)
Typepad has now launched Business Class service, designed to support large scale enterprise blogging efforts. I'd say that's more than a straw in the wind, given how good these folks are at meeting customer needs and wants.
It's really about content management that is not centrally controlled. It's not about blogs, per se. But of course blogs, per se, are not scary -- lack of central control over content, on the other hand, is very scary. Or I'm guessing that's how the average executive in most organizations reacts to this idea.
But you don't have to say no. You can start with the tiniest little yes, and build on that.