MacBook Pro 13" Unibody Mid 2009 Teardown
Quote from mcifix:
I hadn't noted the loss of the microphone port. Arghhh. Tradeoff to get firewire back is worth it, but still very unfortunate for some folks.
RTFM. The Tech Specs on the product page clearly indicate that it is a combination input/output that is user selectable. It is also worth noting that it supports the Apple stereo headset with microphone.