On trade in of those of us who have the old iphone - the responses to previous questions about this have been difficult for me to navigate to find the definitive answer. Is it officially May 27, 2008? That if you purchased your iphone BEFORE that date, you ARE NOT eligible to trade in your old iphone.
If so, this is the last time I am buying a new innovative product from Apple when it first comes out. It seems just too soon to be offering such a significant upgrade on a product which I have only had for 7 months! Usually it is 2 years before a cell phone is upgraded.
If you can't handle that new tech continually comes out at lower prices, then it would be a good idea not to purchase the newest tech out. Just wait and get the older technology. I think you'll be a lot happier.