Corporate Blogging - what are the benefits?

I have been trying to quantify the benefits of a corporate blog to companies like ours. Here are some interesting articles on the topic:

Google has a employee blog connected to its intranet. Here are some of the benefits they see: people keeping track of meeting notes, people sharing diagnostics information, people sharing snippets of code, as well as more personal uses, like letting co-workers know what they're thinking about and what they're up to.
More here

The Harvard Business School has a interesting article about different corporate blogs and how they work. Check it out.

Here's a Business Week article.

Here's a whole list of corporate blogging guidelines.

A good marketing.org article.

A great ClickZ article on blog ROI.

If you find more along this line, please post the links...
Wm