A few items over the past week have got me thinking. Maybe we have this idea of a 3g phone all wrong.
What if it is 2 phones that we are talking about.
Phone 1. Update existing iPhone design with 3G. This is possibly the reason for the shortages we are seeing nationwide. Perhaps this gets refreshed very very soon to cover the lack of iPhones.
Phone 2. New iPhone Pro. This is what the ramp up and build for an "advanced" version of the iPhone. We might see this in June. Perhaps have GPS, second camera, OLED, etc.
yeah, that's what i've responded sometimes in the some "3g iphone next tuesday" threads.
apple needs to add something more than 3g for iphone in order to keep the current price points. though the features you listed have nothing to do with "pro". a pro iphone would have enterprise features, such as ability for the it-department to administer the phone over the air and slide keyboard for email heavy user and stuff like that.
what you describe sounds more like multimedia-iphone. i'm not sure about price/benefit relation of oled yet, gps, 2nd camera for sure. other features of such phone would include 5mpix camera with autofocus and lens cover, video recording, geotagging of photos etc. in short, things that are common in european smartphones.
besides that, apple also needs something cheap to gain sales volume, especially if they plan to enter china. actually they wouldn't even need 3g as i think china is even behind the us in 3g network coverage.