Something's going on with Amazon.com and agency (?) titles. They either appear as "Not currently available" or "This title is not available for customers from: United States" . This includes the Kindle Daily Deal for today
http://www.amazon.com/gp/product/B000OCXI3K/
I first noticed this because I have an ebook wish list and saw that the prices disappeared and the button changed from "Buy with 1-Click" to "See all buying options".
Anyone know what's up?