A little birdy tells me that NikonUSA actually has several changes coming in terms of pricing on, I think, February 1st. Most interesting is that lenses now all seem to have MAPs (minimum advertised prices). This is going to change the ball game almost as much as price changes, I think. And it seems to imply that we may see the same things with lenses that we saw with camera bodies in Q4 of 2008: periodic Nikon/dealer cooperative advertising with temporary instant rebates or other incentives. Also expect a lot of "add to cart for lower price" disclaimers.
Curiously, it doesn't seem Nikon is changing camera prices (though camera+lens kits should change). The price increase seems primarily targeted to lenses, and should typically be in the high teens in terms of percent at street prices. When you think about it, keeping camera prices steady but raising lens prices makes some sense. Cameras have very short sales lives and depreciate quickly, lenses don't. Moreover, many of those lenses have had the same list prices since the yen was 125 to the dollar (as I write this, we're at 91.3, a 27% drop).
The bottom line: if you've been putting off buying a lens, you might want to consider taking the plunge. I see a maze of twisty passages ahead.