One person on Kindleboards is reporting that Amazon sent him an email saying they were pulling his titles because he raised the price to $2.99 and they're still elsewhere at 99 cents (as I reported previously, it takes Smashwords a relatively long time to correct this stuff). Wow... pulling his titles is kind of harsh (surely lowering the Amazon price would be adequate?). I hope this is an automated system response, and that Amazon will be willing to work with authors who are caught in this sort of bind.
Meanwhile, every one of my books seems to be available for sale again EXCEPT my bestseller. I sincerely hope the sales rankings aren't functional right now. If NLaS drops badly in the rankings because it wasn't available, I shall be very... put out.
ETA: Update from Amazon: "Books in this category will not be removed/unpublished/banned from the website, but will be made unbuyable for a short time, to let other parts of our price matching logic catch up. We'll work on the wording of that message to make it more clear."
And my books are all selling again, yay!