With so many people sharing pictures on the iPhone, you would think that Apple would have made major improvements between the original iPhone and the 3G. Hopefully in the next generation of iPhones, there will be a more advanced camera. But until then several independent companies are developing solutions to an otherwise mediocre camera. One example is a fish-eye magnet-mounted conversion lens developed by Digital King.
The fish eye lens can be attached directly to the iPhone camera through a mounting system. The only problem is that it costs $100 with no release date announcement made yet. The product is being manufactured in Japan.