Apple Sells 1 Million iPhone 3GS Devices In Three Days

Marketwatch is reporting that Apple hit the 1 million mark over the weekend. That’s 1 million iPhone 3G S devices sold. Obviously that’s a great number to hit, but I wonder what the breakdown was. How many devices were sold to customers that already had an iPhone vs. new iPhone users? Knowing iPhone users my guess is a lot of the purchases were made by existing iPhone users. That being said what are these people doing with their old iPhones. At this point there must be so many iPhones floating around the world that you could probably build a house or even a building solely out of iPhones. If you purchased the new iPhone 3G S I’m curious to know 1) where you a previous iPhone user or not and 2) if you were an iPhone user what do you plan on doing with your old iPhone.