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!"
The MX400 is actually a pretty nice MP3 player, though it's a bit dated. (Perhaps that's why they added the VoIP feature, to snazz it up.) PROS: very nice flash-basd GUI. CONS: maxes out at 2GB flash (pretty measely by today's standards; 4GB should be the min). And, while it does have an SD card slot, if you notice in the picture, it STICKS OUT the top--that's right, the card doesn't actually go all the way inside the unit. Very strange design.