Isn't the point of a corporate blog to drive users to your product? Then why do the blogs never have an easy way of getting there? Clicking the logo and things in the header all just take me to the front page of the blog. Pet peeve of mine.
I think it is because bearblog (software we use, or at least the version we have) does not allow custom external in the navigation. But the product website is linked to in the very first sentence, and also from the home page of the blog. Still not good? :)