[corey_moncure]

Optical audio I/O. Many people might not know this, but you could actually plug in an optical S/PDIF cable into your Macbook Pro, on both the "microphone" input and "headphones" output line, to get digital audio in and out.

[interestica]

I had that on an 09 Pro/Unibody. It was kinda brilliant (ha). Imagine such dual type port on a phone...