Let the hive mind of Engadget get that for you.
"We need a digital camera that can be switched on and fire off that first shot fast. It's not a commonly tracked statistic on any review site, and nobody seems to have this information for every camera. We were hoping other readers could inform us as to what small digital cameras can fire off their first pics in under a second (ideally under half a second). It needs to be small, but mostly, just really quick in operation. Thanks!"
I actually think this concept might be a "killer app" of the future, but not before companies understand what its use will probably be.
About 5-6 years ago, 3Com released this thing called "Audrey" that was like a "family pda" with internet surfing etc. I was perfectly ready to buy one to sync up the palm pilots in my family at that time. I thought it would be cool to have a common e-calendar that would be up to date with all the appointments for the kids, wife, and me. Alas, it couldn't do that.
I'd love to have an electronic "family manager" that synced calendars, developed a weekly grocery shopping list by joining the stuff I put into my smartphone with what my wife has put into hers, and developing a two-way, asynchronous message board that hangs on the fridge. That would be a great app.