Here [pbs.org] is a link to PBS' Media Shift yesterday which did a bit on Google admitting to a "bug" as they adjust their search results. The author got good quotes from Matt Cutts and Danny Sullivan.
(An aside: It's amusing that in the comments section the erotic sites got their shorts in a knot about PBS not linking to them. First, they want to be outside the mainstream, then when they're treated as being outside the mainstream, they whine about it.)
This "story" was all over the blogs a week ago, or even more. Seems to me there's a much bigger Google story brewing right now, but PBS may need to wait for the blogs and forums to pre-digest it and then spoon-feed it to them.
There's more, too. This presents a picture to me of some massive data movement, all around the Google farm. Why? To what end? We don't see a clear picture yet, but these disruptions to normal operation, all occurring at about the same time, seem like they might be related to a bigger picture of some kind.