Basically it will have a 12.4 megapixel sensor and a 2.5-inch LCD display. It will be released later this year, probably in November.
More info at Digital Photography Blog
Effective pixels - 12.4 million Image sensor - CMOS sensor, 23.7 x 15.7mm size, 12.84 million total pixels Image size - Full Image: [L] 4,288 x 2,848-pixel / [M] 3,216 x 2,136-pixel / [S] 2,144 x 1,424-pixel High Speed Crop Image: [L] 3,216 x 2,136-pixel / [M] 2,400 x 1,600-pixel / [S] 1,600 x 1,064-pixel Sensitivity - ISO equivalency 100 to 800 Storage media - CompactFlash™ (CF) Card (Type I/II) and Microdrive™ LCD monitor - 2.5-in., 235,000-dot, low-temp. polysilicon TFT LCD with white LED backlighting Exposure metering - 3D Color Matrix MeteringII , Center-Weighted Metering and Spot Metering Exposure Modes - Programmed Auto (Flexible Program possible) [P], Shutter-Priority Auto [A], Aperture-Priority Auto [A] and Manual [M] Interface - USB 2.0 (Hi-Speed) Power requirements - Rechargeable Li-ion Battery EN-EL3a, Quick Charger MH-18a, AC Adapter EH-5 (optional), Multi-Function Battery Pack MB-D200 (optional) Dimensions (W x H x D) - Approx. 157.5 x 121 x 85.5mm (6.2 x 4.8 x 3.4 in.) Weight - Approx. 810g (1 lb 13 oz) without battery and storage media