From Nikon Corporation:
Nikon Transfer is a software application that allows for the simple transfer of images captured with a Nikon digital camera, or images recorded to media such as memory cards, to a computer. It also allows for back-up copying and embedding of information including copyright into image data during transfer.
What's new in this version:
Support for Mac OS X version 10.6.2 has been added.
Support for 2GB and larger image files with Mac OS X version 10.6.1 and later has been added.
Actually better than the Windows version - it transfers from (virtually?) any device with images to your Mac
It will launch automatically when you connect an iPad or iPhone to your Mac for any reason (e.g. calendar and music sync) - but you can kill it and move on with a click
When combined with ViewNX2, Nikon Transfer is a slick workflow system. It enables you to choose which files to transfer from your camera, card reader or i-Device, where you want to store them - and then, if you have ViewNX2 installed, it will open a fine Lightroom-like display from which you can select any editor on your Mac.
The best part is, it bypasses the arcane iTunes interface and gives you direct access to the images on your iPad or iPhone - just as you would expect on a Windows system. I was stunned the first time it did that - I swear the Apple developers went WAY out of their way to make sure their language obfuscates simple tasks like file transfer.