New cameras mean that someone at Nikon has to "rework" the Nikon software. I put "rework" in quotes, because sometimes--and I think the Nikon J2 is an example--the actual work probably consists of making sure that the text string J2 is recognized in the EXIF file and processed the same as files with the J1 string. Nikon NEF Codec 1.15.0 was also released for Windows systems, also bringing "J2 support."
Capture NX2 goes to version 2.3.4 and adds J2 and P7700 support as well as fixing one known issue (uh, I think Nikon meant "crash").
In addition Nikon ViewNX 2.5.1 for Windows has appeared with a change to fix a printing problem with International sized papers, while Camera Control Pro 2.11.1 gets a fix that allows it to be recognized on Macs with PowerPC processors.