A lineup of camera and flash triggering devices, called NERO, recently became available via a dedicated web store
. There are currently two models: the NERO Multi Trigger, which will fire a camera or flash based on sound, laser, or lightning input and the NERO Lightning, which can be triggered, as the name implies, only by lightning.
Configurations are available for most Canon and Nikon DSLR models.
The NERO web site is slim on technical details, but the NERO Multi trigger evidently has ten operating modes, including not only sound/laser/lightning triggering but also two time-lapse modes, as well as bulb and long exposure modes. Sensitivity is adjustable in ten levels, according to the NERO web site.
The NERO Multi sells for US$199 and the NERO Lightning sells for US$117, both with free shipping.