Just the specs lined up side by side.   Detailed thoughts on each coming soon. But for now I will say that As a primarily still shooter using a camera to make money the 7D is still the DX champ.  If you are primarily a still shooter hobbyist the T2i is an excellent value but if video is more your thing the 60D with articulating LCD, Manual exposure and manual audio settings looks to be an excellent options.

Stats	550D / T2i	60D	7D
Price	• Body only: $799 | Buy at Amazon	• Body only: $1099 | Pre-order at Amazon	• Body only: ~$1550 | Buy at Amazon
Construction	Stainless Steel and polycarbonate resin with glass fiber	Polycarbonate resin with glass fibre on aluminum chassis	Magnesium alloy body, Weather Sealed
Sensor	• 18.7 million effective pixels • 18.0 million total pixels • 22.3 x 14.9 mm CMOS sensor • RGB Color Filter Array • Built-in low-pass filter with self cleaning unit
Processor	DIGIC 4	DIGIC 4	Dual DIGIC 4
ISO range	• Auto (100 – 6400 *) • H1 expansion (ISO 12800 equiv.) • Highlight tone priority	• Auto ISO (100-3200) • ISO 100-6400 in 0.3 or 1.0 EV increments • H (12800) expansion • Adjustable Auto ISO limit	• Auto ISO (100-3200) • ISO 100-6400 in 0.3 or 1.0 EV increments • H (12800) expansion
Movie resolution	• 1920 x 1080 (1080P, 16:9) @ 30/25/24 fps • 1280 x 720 (720P, 16:9) @ 60/50 fps • 640 x 480 (4:3) @ 60/50 fps	• 1920 x 1080 (29.97, 25, 23.976 fps) • 1280 x 720 (59.94, 50 fps) • 640 x 480 (59.94, 50 fps)	• 1920 x 1080 (29.97, 25, 23.976 fps) • 1280 x 720 (59.94, 50 fps) • 640 x 480 (59.94, 50 fps)
AF sensor	• 9-point CMOS sensor • F5.6 cross-type at center, extra sensitivity at F2.8 • AF working range: -0.5 to 18 EV (at 23°C, ISO 100)	• 9 cross-type AF points (f/2.8 at center) • Center point additionally sensitive with lenses of F2.8 or faster • AF working range: -0.5 – 18 EV (at 23°C, ISO 100)	• 19 cross-type AF points (f/2.8 at center) • Center point additionally sensitive with lenses of F2.8 or faster • AF working range: -0.5 – 18 EV (at 23°C, ISO 100)
Metering sensor	• TTL 63-zone SPC • Metering range: EV 1.0 – 20 EV	• TTL full aperture metering with 63 zone Dual Layer (iFCL) • Metering range: EV 1 – 20 EV	• TTL full aperture metering with 63 zone Dual Layer SPC • Metering range: EV 1 – 20 EV
Viewfinder	• Pentamirror • 95% frame coverage • Magnification: 0.87x (-1 diopter with 50 mm lens at infinity) • Eyepoint: 19 mm	• Eye-level pentaprism • 96% frame coverage • Magnification: 0.95x • Eyepoint: 22 mm	• Eye-level pentaprism • 100% frame coverage • Approx. 1.0x magnification • Eyepoint: 22 mm
LCD panel	• 3.0″ 3:2 TFT LCD • 1040,000 pixels	• 3.0 ” TFT LCD • 1040,000 dots (3:2) • Articulated	• 3.0 ” TFT LCD • 920,000 dots (4:3)
Continuous shooting buffer	• Continuous: 3.7 fps • Up to 34 Large/Fine JPEG / 6 RAW frames	• Approx. 5.3 fps • Up to 58 JPEGs, 16 images (RAW)	• Approx. 8 fps • Up to 126 JPEGs (with UDMA card), 15 images (RAW)
Memory format	• SD / SDHC card / SDXC card	• SD / SDHC / SDXC	• Compact Flash (I, II and UDMA)
Dimensions	129 x 98 x 75 mm (5.1 x 3.9 x 2.9 in)	145 x 106 x 79 mm (5.7 x 4.2 x 3.1 in)	148 x 111 x 74 mm (5.8 x 4.3 x 2.8 in)
Weight (inc battery)	530 g (1.17 lb)	755 g (1.6 lb)	904 g (2.0 lb)

Added Sept 3rd – Engadget has a hands-on video