While most of us would really like to see Nikon embrace a new flash system that has built-in wireless support, slowly we're getting more and more third party options. I've been using PocketWizard FlexTTL5, miniTT1, and AC3 for over a year (though where's the D4 and D800 support?), and it's just a better experience than trying to do wireless flash with infrared light.
Now we have another option: the Phottix Odin TTL flash trigger. This US$350 combo provides full wireless flash, including grouping. You get a transmitter and receiver unit for the price; to add additional flashes you'd need additional receivers (US$145).
Several years ago, Phottix accessories were a bit unpredictable in terms of quality and consistency. That's gotten better with each generation of product, so let's hope that this new option gives us a full alternative to PocketWizard (competition is always good).