Nikon announced, well, not much. With Apple Lion (OS X 10.7) out today, Nikon at least issued a short notice on their sites about it, but the notice didn't tell you anything you probably didn't already assume. Worse still, it seems to verify that Nikon still doesn't understand much about what customers expect of them in the software business.
First, the announcement: Nikon plans to test their current software under Lion. When they find out how it works, they'll "announce our plans regarding full compatibility." Some people are assuming that means that Capture NX2, View NX2, Camera Control Pro 2, and the WT-4 software will be made compatible. I don't think the statement says that at all. All it says is "now that Lion is out, we'll start testing. We'll tell you what we found out later." In other words, business as usual at Nikon.
What should Nikon have done? The same thing every other reasonable software company did: when Apple started distributing Lion betas to developers, you test your products with it. When Apple distributed final candidates to developers, you start announcing to users what you know about compatibility and what you're going to do about it. Nikon is two steps behind.
But more to the point, Nikon almost certainly isn't going to act like most Macintosh software developers. I don't expect Nikon to even remotely consider adding Lion's Autosave capability into their apps, for example. All Nikon is likely to do is try to get things to run on the new OS. Nikon does not embrace new features or capabilities (hey Nikon, where's 64-bit?). They run their software business as if it's in the back room of a restaurant staffed by waiters in their down time. "Your order should be out sometime soon" reads Nikon's latest notice. But they're still using the same three-week old dough and no one has noticed that anyone has invented and popularized new toppings in the last five years. My advice remains the same: find another restaurant.