Sram XX

A few days ago Sram released the official press release for their new X.X mountain bike group. It is going to be a 20spd setup, 10 in back, 2 in front. The rear cassette will be a power dome design like the current red but with deeper reliefs in the body for better compatibility in muddy conditions. The weight for the group is said to fall very close to the Dura-ace 7900 group set.The expected release date is summer 2009. The official press release can be found here.

The shifters will be a double tap design and weight should fall between X.0 and X.9 shifters.

Avids new disc brake is most likely going to be a 9.5mm master cylinder diameter with a tapered bore and the the caliper may be a 22mm piston. This will land it in the same power class as the Elixir with less weight then the Ultimate.
The rear derailleur looks very similar to the Red derailleur form the road line up... You can also easily see that the cassette is a powerdome design and that the chain is a Hollow pin, outter and inner link design similat to the KMC X9 Sl.
In the above picture you cant see any of the crank or rings but with Srams owership of Zipp I`m willing to bet that the crank will be a carbon design, BB30 with external bearings, two rings, a Q-Factor less than 160mm, a chain line of 48mm and a weight close to 650g.The front derailleur still remains annomuous but It will probably be a top pull version of the Red but with a stiffer cage and wider pivots. The weight will hopefully be below 115g. As long as it is not another x.9 design, I dont really care.