Today I find myself describing to a few friends why I really like the StackExchange network (recent corporate events notwithstanding). One of my reasons was that many sites on the network have experts in their field as regular users. For instance NASA engineers on space.SE or Microsoft employees on SO.
It got me wondering though, have there ever been any employees of Wizards of the Coast active here on RPG.SE? Particularly ones that had authored content and would appear on the inside cover. I would also accept major 3rd party sources as well.