Formal announcement tomorrow.
Looks like a nice uptick of the specs. Notable is no AA filter and a 3.2 inch LED like the big boys. The sensor was expected. Native ISO to 6400 is killer - now you can shoot in the near dark with no (little) image degradation.
Will need to see the body on Thursday to see if there is direct access to some controls like the D300s. Also notable is Nikon missed it on the video side with only "i" for the two high frame rates in 1080 resolution. Not enough processing power I guess.
Leaked Nikon D7100 specs:
24.1MP CMOS sensor
No AA filter (similar to the D800E)
51 AF point, 15 cross-type
Built-in HDR function
2016-pixel RGB sensor
3.2" 1,229k dots LCD screen
Dual SD card slots
EXPEED 3 processor
ISO range: 100-6400
Video: 1080p @ 60i/50i/30/25/24 fps plus 720p @ 60p
Compatible with the WU-1a wireless mobile adapter
Edit Thursday morning: The official announcement now made. Same price as the D7000, amazingly. 51 point focus system. Wow (stolen from the pro cameras.)
Now knowing the price point of this camera, there is a gaping hole in the Nikon price point line up. The D7100 is $1200 and the D600 is just under $2,000. That leaves (hopefully) room for the D300s replacement. Looks like Nikon crippled a few features in this camera, hinting there may be another body to come.
One last point: For you artificial light shooters (probably not many here), max flash sync 1/320th !! Nice surprise.
Some additional info for those interested: