Building Credibility in Blogging?

One of the topics I'm wrestling with is the ability or the requirement to build reputation and credibility in the blogosphere. How does one go from zero to 60 in respectibility points? Is it something that can happen over the course of time, or is it something that has to be acquired, rather than home grown?

By acquired, I'm referring to "borrowing" respectibility in other writers, guest posters, folks who "already have the badge of credibility"?
Is it about what your bio looks like? Is it about the profound things you've said before or posted elsewhere?

How does a corporate blog create credibility and reputation? Stick with me on this...

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