Rumored new lens mount to be called "E"
Here are the rumored specs
14mp APS-C CMOS
SDHC or MS memory cards
3.0 LCD 920K color
11 AF point
video recording (model NEX5: 1080 NEX3:720p) format Mp4 or AVCHD
built-in flash and AF Assistance light
new FW50 batteries
Supposedly the first new lenses in the E-mount will be a 18-55/F3.5-5.6 and a 16mm/2.8.
A Nikon F-mount adapter would be very interesting with this camera if Sony is in fact going to make it APS-C!