Okay, I finally have confirmation, sorry it took so long, but there was a lot of moving around going on. The first info that showed up online saying it would be released in August was completely wrong. August was never a possibility.
The official release date is December 28, 2010. The sad news is--that's longer than I'd hoped for. The good news is that the book is much longer and we've got a ton of fabulous stuff planned between now and then for you all! The other good news is that the time between Christmas and New Years can be a little slow, which makes it a perfect time for reading!
This shouldn't change but if it does, I'll tell you as soon as I know. Usually the reason a publisher changes a release date is to avoid complications in placement in stores and on lists. Some dates, there are so many other new books coming out that the pubs can't get the in-store placement or discounts for the book they need, so they re-arrange things (which often results in a massive shuffle, like what happened this past fall when Dan Brown's release date was announced suddenly.)
Sorry it's so far off! I can't wait till it's released either!