It is not a typo. Chris Anderson and Ross Mayfield have created the Fortune 500 Blogging Wiki (thanks to Alison for the heads-up. She's always sooo smart and connected) documenting the blogs from companies in the Fortune 500. Not surprisingly, those that dominate so far are the tech companies. It will be interesting to see if the companies, themselves, come into the wiki to "claim" their own blogs. A great resource.