10-minute preview on YouTube
Anime News Network Article
Short version: Upcoming movie The Dark Knight gets its own Animatrix treatment. Rumour has it that Satoshi Kon (Perfect Blue, Paranoia Agent) will be helping out on one of the 6 short films as well.
The 6 of them will be standalone stories, but are 'compatible' with both Batman Begins and The Dark Knight.
I was already moderately excited for the movie, but as a huge fan of anime (and particularly 2/3 of the Japanese studios involved) it makes the thing so much sweeter. Check out the video preview! Amidst all the old men talking about it, there are clips of the various animated features scattered throughout.