Do I think that the same person/title in every organization should be blogging? No. Do I think every organization should encourage their employees to blog? Yes.
The problem is, when a company is presented with blogging, their first question usually is 'yes, but how do you MAKE MONEY off that?'. Until you can quantify the process and show CEOs a figure on a balance sheet that says 'last quarter we had X number of dollars in increased sales for every blog post', then most companies don't see the need for blogging.
That's not how blogging works. It works by letting companies and their customers BETTER UNDERSTAND each other. Blogging can also change a company's entire culture. Just the other day I ran across a blogger from Sweden who was 'outted' as a blogger by a member of the company's marketing department. Since that time, the entire marketing department has started turning to her to teach them about blogging and social media, and now they are trying to get the company's CEO to start blogging. A few days ago no one in the company was publically blogging, now the entire marketing department is getting into this space.
The point is, as Hugh MacLeod once said, that blogging makes things happen indirectly. Start blogging and you start talking to your customers. They start talking back. You start to better understand them, they start to better understand you. They realize that you are listening to them, you realize that they just want to be heard. Their expectations of you begin to change to meet your limitations, your processes begin to change to better meet their wants and needs.
End result? Sales increase. Costs go down. Customer satisfaction and service goes up. All this happens indirectly.
The Catch-22 is that companies truly can't see the benefits of blogging until they start, and many don't want to start until they KNOW they can make money off it.
Again, this is why I said yesterday that the stimulus for companies to embrace blogging has to come from the inside, not from the outside. Sure, in a few years every company may understand exactly why they need to blog, but for now, unless there are bloggers working for a company and passionately spreading the word internally, then they have no clue other than to ask the 'How do we make money off that?' question.