I've got lines on the top of my iPod Touch (2nd gen) and they won't go away.
I've checked some other forums and they told me to:
Turn the brightness all the way up and go to some funky strobing website for 6 hours.
Put it in the freezer (never again)
Press down on the screen, but the lines are too near the top to do that (without breaking it)
Are there any other old wives tales relevant to fixing dead pixels. I've seen some come back and go away so I think it's not a totally lost cause.