Micro Persuasion: Sell on Search: The theory that search engine rankings are key to selling the power of blogging internally. I think this is right on; if you can point out how dramatically it can affect public perception, if you're taking the right steps, this can help with corporate barriers and reducing the Invisible blogger factor.

Several other interesting articles:
Good article on possible solutions to blog overload.
Article on JotSpots interviewing processes.