I bought and iPhone with 16GB and my memory is full... I wish there was a way to expand the memory of the iPhone with memory cards for example? Given its price I can't really afford a new one just for more memory...
Replace the iPhone standard connection with a mini USB connection this will allow much more flexibility to charge the iPhone without carrying the Mac cable all the time. Mini USB charger is becoming the standard for nearly all the new generation of mobile phone, Why not the iPhone5?
So many people I know (especially in the US) constantly carry their iPhone charger cables with them when they leave the house. We need better battery life!!! Though each new model has increasingly better battery life, it also has increasingly better apps/options so we are increasing our usage. I think this is something that Apple should focus on. A dead battery renders all other amazing parts of the phone useless.