Interesting news at Velo News a few weeks back. Shimano is upping Dura Acce’s rear cassette to 11 in their 2013 offering. This will match Campy’s 11 speed rear end which has been on the market for 3 years. The 2013 Dura Ace set will be series 9000 (a change from the current 7900 series). It is assumed that the 11 speed Ultegra set will be the 8000 series in 2014.
In other cycling notes, it seems that the new electronic Ultegra Di2 series will soon to be arriving at a bike manufacturers (and then at the local bike shop) soon.