Tons more info available at Mashable:
Update: Official specs from Apple’s own iPad website (http://www.apple.com/ipad/specs/)
Size and weight
- 9.56 inches (242.8 mm)
- 7.47 inches (189.7 mm)
- 0.5 inch (13.4 mm)
- 1.5 pounds (.68 kg) Wi-Fi model;
- 1.6 pounds (.73 kg) Wi-Fi + 3G model
- 9.7-inch (diagonal) LED-backlit glossy widescreen Multi-Touch display with IPS technology
- 1024-by-768-pixel resolution at 132 pixels per inch (ppi)
- Fingerprint-resistant oleophobic coating
- Support for display of multiple languages and characters simultaneously
- 16GB, 32GB, or 64GB flash drive
- 1GHz Apple A4 custom-designed, high-performance, low-power system-on-a-chip
The rest of the specs can be found at Apple’s site, but what I’m really interested in is the display and the processor:
In-plane switching (IPS)
In-plane switching is an LCD technology which aligns the liquid crystal cells in a horizontal direction. In this method, the electrical field is applied through each end of the crystal, but this requires two transistors for each pixel instead of the single transistor needed for a standard thin-film transistor (TFT) display. This results in blocking more transmission area, thus requiring a brighter backlight, which will consume more power, making this type of display less desirable for notebook computers.
The Apple A4 is a CPU, used in Apple‘s iPad tablet computer, which runs at 1 GHz. It was announced on January 27, 2010.
It is a system on a chip-processor with integrated graphics processing unit. The graphics processor design is likely to be licensed from Imagination Technologies, which confirmed Apple was a licensee on 18th December 2009 . It is designed by Apple’s in-house chip design department, formerly known as P.A. Semi. The CPU uses the ARM architecture.  
I’m still trying to track down more info on the A4 itself, but from what I’ve seen in the official video and some of the other videos from Mashable and Gizmodo, this thing is *fast*. =)
Update #2: More info about the A4 can be found here:
The processor is branded as a little recent design amount however it and also the GPU are most likely the same pace since the 3GS. The old Contact using the same CPU and GPU since the 3G was faster. Apart from having the clock speed turned up greater the Touch has much less software to run since it is not a telephone. It ought to do more than any iPhone to this day in performance.