I downtoaded the version on the UK site but would not let me install as my version is US. Dont waste the 30 plus minutes it takes to download. You would need the UK version for it to work. I guess we just have to wait a little longer in the US.
Each region maintains a web site for their region, so you should use the region where your camera is registered with Nikon. Note you may need to register your camer with your regional site to download the sorftware, firmware, and unprotected manuals in PDF format.
The US site has the Capture NX updater to 2.1.0 for both Windows and Macintosh. The ver 2.1.0 updater will only update versions 2.0.0 and 2.0.1.
Adobe still has not updated Digital camera raw file support, ACR plugin and DNG converter, for the D90 or D700. You can use the provided link for checking for updates.