hey hungryhun
i'm not sure if this will help at all, but i bought a flash trigger off of ebay probably a year ago now... it's called the 'AEO Lightning Strike! II'
the company webpage is
www.aeophoto.com
in a nut shell, when the sensor detects the flash of lightning it tells the camera to take a pic (it works AWESOME!). i have no idea if they have anything that will trigger as a result of sound or laser, but you might want to fire them an email.... they could have some leads