I'd buy one if it wasn't for the stupid fact that Apple moronically made the device so thin, that they compromised the ambient light sensor which is a very useful function in my opinion (saves battery life).
I was also upset when I heard that Apple eliminated the light sensor but, now that I have a IPT5, I don't miss the light sensor at all. The battery life and everything else in the IPT5 is so much better then my old Touch. I can't see anyone wanting an IPT4 after really using an IPT5.