http://www.canonrumors.com/2011/10/canon-eos-1d-x-possible-press-release/
pretty impressive. Not super groundbreaking, but it will be a really nice body.
Full Frame
18.1MP
Dual DIGIC 5+ – 17 Times The Processing Power of DIGIC 4
ISO 100-51200 Native
100,000 Pixel RGB Metering Sensor
EOS iSA (Intelligent Subject Analysis)
61 Point AF
21 f/5.6 Cross Type Sensors
20 f/4 Cross Type Sensors
5 f/2.8 Cross Type Senors
EOS iTR AF (Intelligent Tracking & Recognition Auto Focus)
12 Frames Per Second
14 Frames Per Second JPG Only
400,000 Shot Rated Shutter
Ethernet Connection
March Availability