NintendoScene has the WiiU specs.
http://nintendoscene.com/2012/06/05/wii-u-specs-revealed/Launches: Holiday 2012
Size: Approximately 1.8 inches high, 10.5 inches deep and 6.8 inches long.
Weight: Approximately 3.41 pounds (1.5 kg).
Appearance: The new console features a compact design that will make it a natural addition to any home entertainment setup.
Wii U GamePad: The Wii U GamePad controller removes the traditional barriers between games, players and the TV by creating a second window into the video game world. It incorporates a 6.2-inch, 16:9 aspect ratio LCD touch screen, as well as traditional button controls and two analog sticks. Inputs include a +Control Pad, L/R sticks, L/R stick buttons, A/B/X/Y buttons, L/R buttons, ZL/ZR buttons, Power button, HOME button, -/SELECT button, +/START button, and TV CONTROL button. The GamePad also includes motion control (powered by an accelerometer, gyroscope and geomagnetic sensor), a front-facing camera, a microphone, stereo speakers, rumble features, a sensor bar, an included stylus and support for Near Field Communication (NFC) functionality. It is powered by a rechargeable lithium-ion battery and weighs approximately 1.1 pounds (500 g).
Other Controllers: The Wii U console is capable of supporting two Wii U GamePads, up to four Wii Remote (or Wii Remote Plus) controllers or Wii U Pro Controllers, and Wii accessories such as the Nunchuk, Classic Controller and Wii Balance Board.
CPU: IBM PowerR-based multi-core processor.
GPU: AMD RadeonTM-based High Definition GPU.
Storage: Wii U uses an internal flash memory. It also supports SD memory cards and external USB storage.
Media: Wii U and Wii optical discs.
Video Output: Supports 1080p, 1080i, 720p, 480p and 480i. Compatible cables include HDMI, Wii D-Terminal, Wii Component Video, Wii RGB, Wii S-Video Stereo AV and Wii AV.
Audio Output: Uses six-channel PCM linear output via HDMITM connector, or analog output via the AV Multi Out connector.
Networking: Wii U can access the Internet via wireless (IEEE 802.11b/g/n) connection. The console features four USB 2.0 connectors – two in the front and two in the rear – that support Wii LAN Adapters.
Wii Compatibility: Nearly all Wii software and accessories can be used with Wii U.