Adam Wilt, who did a preview of the HXR-NX5U, also has some information on the HDR-AX2000. He seems to think the camera will support SDHC cards as well as Memory Stick, yet that's not what Sony said in their press release, and the specifications page (above) also has no mention of it.
In addition to the differences I already noted between the HDR-AX2000 and the HXR-NX5U, he adds that the camera lacks:
Despite these differences, I think the HDR-AX2000 camera looks very attractive.
- No B&W EVF mode; macro focus; high-speed zoom; smooth-transitioning gain and white-balance; hyper gain; viewfinder markers and safety zones; numerical zoom display and focus distance display in feet; black level, black gamma, knee, and color depth adjustments; manual white balance setting; colorbars with tone; individually switchable front & rear tally lamps; shutter angle display; hour meter; TC reset via remote control.
- Fewer tweaks for color modes, gammas, and detail settings.