I just found this free software for Mac users that allows tethered shooting for Nikon cameras such as the D3x, D3, D700 and the consumer D90, D80 and D5000. Support for other Nikon cameras will come shortly.
I downloaded the software this morning at 9:52am and began shooting tethered photographs with my D700 at 9:53am. It is that easy to use and setup. Awesome. I’ll put it through its paces and give a more detailed review later.
Here’s the download link: http://www.sofortbildapp.com/
Here’s the FAQ page: http://stefan.hafeneger.name/2009/04/29/nikon-control-beta-3/