I have just updated my iPhone 3G with the 3.0 update and it has been a success. However, I cannot for the life of me figure out how to turn on push notifications. I read that certain apps are required to see the setting to be able to change it, so I downloaded both AIM and IM+ Lite - both of which say they support push notifications. Still no sign of the push notification setting in the Settings. I have tried restarting and resetting, using both apps, still no push notification setting. Am I missing something?