This could be a nice set, but at this rate it looks like they will release and anniversary edition every 5 years...I am willing to bet that they release a 75TH Anniversary Edition!!!
I own the UK 3-disc edition, which I know has less features then the US 3-disc edition... the print used in that release looks flawless, and this edition apparently features an even better one. I'm excited by that detail alone. I wasn't going to order this, but when I saw the extra features listed in the link provided above... I can't NOT order it! Looks to be a release worth owning.
People posting on the Amazon.com website note a September 29,2009 release date. This is verified in the context of both Borders and Barnes and Noble web pages as well. So there's alot of time to save one's pennies for such a set!