I gotta be honest, I didn't have a chance to actually read this article before I posted, but it is an iPhone, with a big-ass adapter and a 9-pin serial plug coming out... That's good enough for me!
http://www.computerworld.com.au/slideshow/365979/great_iphone_serial_port_hack/?fp=4&fpid=5
Again, to be honest --I don't know if this iPhone advance or serial-whatever will help any of us buy hey --I saw it on Boing Boing and you can't go wrong there!