Nikon has released Capture NX2 version 2.3. The new version has a number of enhancements to speed and performance. The new version is better - especially with larger files like the D3x and the D7000 (and maybe future cameras).
The new software can be installed as a 32 bit or 64 bit application. For users of Color Efex Pro 3.0, the 32 bit application should be selected. With Windows, select 32 bit during installation. With a Mac, you can move back and foorth between 32 bit and 64 bit operation. Color Efex 3 is not compatible with 64 bit Capture NX2.