I've got a 20gb fourth generation (black and white) that is just under a year and a half old but seems to be in its death throes. It will occasionally freeze up and refuse to give me anything but the error icon. I've followed all Apple's steps to no avail, but did disover the one thing that seems to consistently (knock on wood) bring it back to life - opening it up. That's all - don't have to tap the hard drive (some people have that problem - stuck platter) or anything, just open it up and it works again. I just don't want to have to buy a new one.
"We should print up T-shirts! And F-shirts for our friends with two arms on the same side!"