PBS had, by far, the best coverage of World IPv6 Day. The piece was technically accurate, informative, picked excellent people to interview, and had no "doom" hype. The broadcast piece is here. Additional material that didn't make it into the broadcast is here.
The worst coverage? A certain network magazine that covered it as some kind of Y2K Doomsday Conspiracy Theory. I won't mention their name. F---tards.