I noticed the other day a black dial Master Chronograph with different hands, tachymeter instead of pulsometer, possibly different subdials from before, red "Automatique" inscription under the logo and red dots behind the hour markers. Best of all (for me) is the black date wheel as opposed to white from last year. The font used for the date appears to be different too.
I did not see this model in the SIHH 2012 report or anywhere else.
Here is a pic of the latest piece I am talking about, listed under 2012 creations...
Reference: 153847N
Photo credit: www.jaegerlecoultre.ch h
Comparison with the prior version in black...
Reference: 1538470
Photo credit: www.jaegerlecoultre.ch h
I wonder if the two will be made available parallelly or will the older model be dropped. Personally, I feel the black date wheel is more subtle and harmonious. And I am always a fan of faceted dauphine hands. I don't know the name for the other kind of hands. Any clue on that will be greatly appreciated too 
Ruckdee