Enlight Photo released ioShutter for Nikon cameras. ioShutter contains two parts: an iPhone/iPad app and a special cable that connects your iPhone to the camera in order to control the shutter:
A simple-to-use and versatile shutter release appcessory for SLRs, ioShutter connects a photographer’s iPhone, iPod touch or iPad direct to their SLR. The ioShutter app then offers extensive shutter control features.
ioShutter makes pin-sharp long exposures, stunning light trails, timelapse sequences and more easy for amateur and pro photographers alike. ioShutter even includes ShakeToTake movement and ClapToSnap sound triggers to fill your shoots with photos full of laughter, dance and fun.
The ioShutter shutter release cable for Nikon DSLR costs $69.95. ioShutter is compatible with every Nikon DSLR except the D70, D70s and D80.
The full press release is available here. Here is an ioShutter demo video: