None on my shiny new MBP.
It seems like a rare phenomenon these days, but I guess most manufacturers like to cover themselves against returns anyway.
I didn't have any dead pixels on my Thinkpad, nor on my Vaio, nor on my Samsung laptop. None of my desktop LCDs have any dead pixels (A sony, two samsungs, a dell, and an Iiyama), and neither does the Samsung LCD TV I use for the Mini in the bedroom. My GF's Imac screen is perfect too.
There are issues with a few of those screens, but no dead pixels.
My old CRT however, had a blemish right in the middle of the screen which basically amounted to it having a dead pixel...
Oh, one of my PSPs has a dodgy pixel but it's really just a stuck red sub-pixel.