From the official Beatles site (thanks to JG for the tip):
http://thebeatles.com/core/news/7th April 2009
Apple Corps Ltd. and EMI Music are delighted to announce the release of the original Beatles catalogue, which has been digitally re-mastered for the first time, for worldwide CD release on Wednesday, September 9, 2009 (9-9-09), the same date as the release of the widely anticipated "The Beatles: Rock Band" video game. Each of the CDs is packaged with replicated original UK album art, including expanded booklets containing original and newly written liner notes and rare photos. For a limited period, each CD will also be embedded with a brief documentary film about the album. On the same date, two new Beatles boxed CD collections will also be released.
The albums have been re-mastered by a dedicated team of engineers at EMI's Abbey Road Studios in London over a four year period utilising state of the art recording technology alongside vintage studio equipment, carefully maintaining the authenticity and integrity of the original analogue recordings. The result of this painstaking process is the highest fidelity the catalogue has seen since its original release.
The collection comprises all 12 Beatles albums in stereo, with track listings and artwork as originally released in the UK, and 'Magical Mystery Tour,' which became part of The Beatles' core catalogue when the CDs were first released in 1987. In addition, the collections 'Past Masters Vol. I and II' are now combined as one title, for a total of 14 titles over 16 discs. This will mark the first time that the first four Beatles albums will be available in stereo in their entirety on compact disc. These 14 albums, along with a DVD collection of the documentaries, will also be available for purchase together in a stereo boxed set.
