The EOS 7D is official. This is officially the most customizable EOS camera to date with Canon clearly taking notes on what makes Nikon's D300/D300s so successful including the pop-up commander flash to control remote speedlights.
Rob Galbraith has a very nice field test with sample images as well as PDN (which adds a video clip and some more sample images.) while DPReview have their in-depth preview available.
According to Galbraith, the images are about the same as the 50D in terms of noise. While that's not the best hi-ISO performance to speak of, it's actually pretty amazing when you think about how tiny the pixels are.
Specs at a glance:
• 18-megapixel APS-C-sized (aka non-full-frame) CMOS imaging sensor with a 1.6x magnification ("crop") factor
• Individual pixels sized at 4.3 microns
• Gapless megapixel design on image sensor similar to Canon 50D
• Powered by two Digic 4 image processors
• 8 frames per second maximum shooting speed
• 94-shot JPEG buffer; 15 14-bit RAW (126 shots with a UDMA card)
• ISO 100-6400 with a "High" setting of ISO 12,800
• New 19-point autofocus system with all cross-type focus points and dual diagonal light source detection function
• AF system offers 19-point, single point, spot point, AF expansion, or Zone AF
• Orientation linked Autofocus automatically flips focus point for vertical shooting
• "Super-fluid design" with a "natural fit" for the hands
• Quieter shutter rated at 150,000 cycles
• Shutter response time of 0.059 second (Mark III cameras are rated at 0.055 second)
• Mark III prism style optical viewfinder with 100% coverage
• Dust and water-resistant with a magnesium, steel, polycarbonate body comparable in ruggedness to the old Canon EOS 1N film camera.
• 8-channel read out
• Dual Axis Electronic Level Control to help keep shots straight by showing you a graphical level on the back of he camera in Live View or in the optical viewfinder as a series of dots
• Built-in flash with a wider angle over coverage than in the past (15mm max)
• Built-in flash can trigger other strobes (A, B, & C units)
• Manual video control -- ISO, exposure, shutter speed, aperture, as in the 5D Mark II post-firmware upgrade
• A dedicated Start/Stop button for the video
• In-camera movie editing
• Picture styles applicable to movie mode
• Programmable Multi-function button to control various aspects of the camera
• One touch RAW + JPEG mode
• Dedicated power switch by the mode dial
• New 63-zone dual layered iFCL (Intelligent Focus Color Luminosity) metering system