Check out Mark Collier's blog today about content: http://www.mpdailyfix.com/2007/02/company_blog_or_online_brochur_1.html.
When I talk to folks about setting up a blog for their company, I tell them to really think about how they craft their language. People don't want to get a hard sell from the marketing department every time they read your blog. They want something interesting. Something exciting.
Dale Carnegie, one of America's most prolific writers on networking, once said "the only way on earth to influence other people is to talk about what they want and show them how to get it. Why talk about what we want? That is childish. Absurd. Of course, you are interested in what you want. You are eternally interested in it. But no one else is. The rest of us are just like you: we are interested in what we want."
Remember that thought when you are writing your company's blogs...