This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
I don't know why and how publishers do this, but it is a standard practice. It used to be that books that came out in December could register for a copyright in the following year. Now apparently that has crept up to September. It sounds silly to me, but then, so does "Java 2 Standard Edition 5.0" :-)