In case you might be interested...on the NI website.
Kontakt 3 update with 64-bit memory addressing confirmed
I want to bring you the good news that NI has started development on a Kontakt version that supports 64-bit memory addressing for Mac OS X 10.5 and Windows Vista 64.
This will be a free update for Kontakt 3, and will allow to go beyond the 32-bit memory addressing limit and utilize as much RAM as your operating system or host makes available.
This version of Kontakt 3 will also run as a VST plugin under 64-bit hosts in Windows Vista 64 (Windows XP 64 will likely not be supported; standalone and 32-bit plugin operation under Vista 64bit are already possible with Kontakt 3.0.1).
No specific info on the release date yet, but you can expect it sometime in the second half of 2008. It is a substantial development effort and requires a lot of testing and optimization.
I will keep you posted about upcoming milestones of this update.
Native Instruments, Berlin