Looks like IBM is pushing employee blogs - James Snell has posted the guidelines they are following. The interesting part?

So with IBMers blogging both inside and outside our Intranet environment, recognizing full well that it was time to formalize their support for what many of us had been doing for quite some time, the corporate communications and legal teams worked collaboratively with the IBM Blogging Community to draft the Corporate Blogging Guidelines copied below. The core principles -- written by IBM bloggers over a period of ten days using an internal wiki -- are designed to guide IBMers as they figure out what they're going to blog about so they don't end up like certain notable ex-employees of certain notable other companies. They're also intended to communicate IBM's position on such practices as astroturfing, covert marketing, and openly goading or berating competitors -- specifically, don't do it. As these guidelines were being drafted, we drew heavily upon our own experiences as bloggers and the excellent prior art in this space graciously provided by Sun, Microsoft, Groove and many others who have drafted policies and guidelines for their employees.

That's one way to get buy-in to a set of policies - have open participation in the drafting of the policies.