Well, if you are looking for information like history, specifications, interest and availability of all iPhone models at one place, here is a nice iPhone Infographic for this purpose.
According to this inforgraphic, Apple spent 150 million dollars to develop the iPhone, in 2007 Apple paid about 1 million dollars for the iphone.com domain and 1.7 million iPhone 4s were sold in its first 3 days of availability.
[via website-monitoring]
