It looks like Apple is tracking iPhone users data including IMEI number, IP address and stock quote preferences (amongst other things) through a hidden string in the Weather.app and Stocks.app iPhone applications. This information is sent to "http://iphone-wu.apple.com/dgw?imei=%@&apptype=finance" (IP resolved "17.254.32.16"). See screenshot below for details.
From this information, Apple could build a profile on users. Where they travel, where they spend their free time, where they work, where they invest their money, what they browse, etc etc. Obviously most users would like to be able to control who has access to this information. If they connect this data with the credit card that you used to purchase the iPhone (r
