I have. A Philips. Lasted about a year and a half. The light would flash 4 times with about a half second off period between each flash and then turn off for about 20 seconds and repeat the process.

For a ~$35 bulb at the time I got it, I was rather disappointed (this is for a MU10 style bulb). Sure the LEDs may last, but at least for mine the rest of the circuit appears to have had a fault.

I work (possible flame bait) at Circuit City in the car audio department (I'm an installer). I know first hand they already have devices you "blow into" to see if you are drunk or not. If you are fine, it let's you drive. If it senses you are drunk, the car won't start. (Pretty much it's just a Starter Kill which is nothing more than a relay tagged into your car's starter line). The only way to get these devices is if the court orders someone to have it installed in their vehical because of an alcohol related incident. Obviously someone who hasn't been drinking can just blow into the device incase someone does cut their foot with an axe (as suggested above).. or if you just want to cheat the system, and the car would start. This new device mentions about detecting air in the vehical, not just what's comming out of the driver. I live in a college town (Home campus of Penn State), and I know alot of people around here who designate drivers. This new device means more people getting pulled over for no reason, just because someone in the vehical was drinking. For some reason this just doesn't go over for me. But no problem.. how long do you think it would take someone to come out with a signal jammer if they did put this device into vehicals (or to put tape over the sensor)