heck I useta have a disposable cell phone that had a built in led I thought it was a good idea but I havent ever seen that feature on another cell phone since then
My Sony Ericsson K750i has a pretty good LED light. It's there as a camera light but it has a "flashlight mode" and also an SOS blink mode. Its relative lack of robustness, and the fact that I may have worn down the battery with calls, means it doesn't displace my ARC AAA for EDC; but it's a nice extra feature.
(Also, anything that gets non-"EDC" people to EDC a functional flashlight has to be good.)
eeph