Does anyone else get the impression that Stefan himself wrote the whole thing (questions included) and just let the reporter publish it whole? These questions are just too perfect, and read like marketing speak.
*It could just be heavily adapted from the conversation, though.
I could be mistaken, but from previous articles regarding the serial port on the iPhone, this is NOT an actual RS232 port, instead it is a software emulated RS232 (serial) port, that actually does not provide low-level access to the device. Instead, it filters things in realtime, and interprets incoming/outgoing messages as needed.