This is one cool new product for the D90. A multi-trigger for capturing lighting, waterdrops, and more!NERO is a versatile device for photographers to take special photographs by triggering their SLRs or external flashes. The device has been designed based on microcontroller technology. It is equipped with built-in light, laser and sound sensors, also incorporates a timer for flexible control of timelapse photography. Lightning TriggerSound TriggerSound Trigger with LockTime Lapse (1-10 secs)Time Lapse (1-10 mins)Laser Trigger with DelayLaser Trigger with MultiShotLong ExposureSuper BulbManuel TriggerRead More Here at there Website

read more: New Lightning, Sound, Laser Trigger for the Nikon D90!