For instance, I know that 0x46767f0 belongs to an NSString*, is there any way I can find out what NSString it is to help me find some bugs I\'m after?
po 0x46767f0
will send a -description message to the object. That will print out the contents of your NSString but I suggest using Brian's answer to check the contents of your address before you send random messages to random addresses.
-description