I may be alone in this, but as an employer, I don't think having any kind of blog is a good thing at all.
Whether you are talking a successful blogger, an unknown blogger, an outspoken blogger, a very polished professional blogger.. none of those style of blogs are something I would consider a positive aspect of a candidate.
I am going to disagree strongly with this mode of thinking - even though I can understand where it is coming from. It is just antiquated and counterproductive in today's technology world.
Case in point: We (my company) go out of our way to hire people who are as active as possible in social networks. We actively encourage employees to blog, tweet, etc. We go so far as to pay bonuses to employees who are engaged in those activities (nice bonuses too - a few thousand $ a year).
That kind of amplified voice in a
community of peers is something that money cannot buy and is worth far more in marketing value than any crap the marketers can sling against the wall. You will spend FAR more cash on marketing bullshit than on a few bonus checks to employees, and get significantly more sales leads (and recruiting leads!!) from it. It's easily tracked (just ask people how they know about your company), and our internal statistics show it is clearly an order of magnitude more effective than even our very best advertising campaigns. We no longer waste money on marketing bologna.
Who is going to tell the world about the cool stuff your company is doing (and that people will believe them)?
Who is going to spread news about awesome new technology your company is now supporting?
Who is going to demonstrate that your organization is indeed on the "leading edge" and "thinking ahead of the competition"? Those are just empty marketing statements unless they are backed up by social network involvement.
Who is going to defuse negative outcries from your customers when you make a mistake? It is amazing how far a "guys, we screwed up, and here's how we are fixing it" social media post can go towards mending mistakes and even attracting NEW business.
How are you going to know how the market perceives you if you aren't engaged?
Why would anyone want to work for you if they don't previously know anything about your organization via trusted peers?
Why would anyone want to do business with you if all of your employees are scared to death to speak in public?
And why would any decent intelligent person continue working for you if their voice is squelched, while your competitors are encouraging their employees to be engaged? (this is a huge thing for us)