Dunno if this is different between the two (shouldn't be, since both run iOS), but I have an iPod touch 4g and- while it doesn't show me any of the photos *within iTunes*- I can copy them all over just by selecting the device through My Computer... Under "Devices with removable storage" or whatever it just pops up. If you doub-click to explore, there's a DCIM folder up in there with all the photos (including stuff from apps like Photosynth and Instagram).
Does this not work for iPhns?