Unusual firewire 800 port
It's the exact same FW800 / 9 pin connector as most recent macs. The unibody frame has the port set a slight bit deeper on the unibody macs than was common on the non-unibody macs.

Here is the diagram from the MacBook Pro 13 inch (Mid 2010) and the only difference in the newer MacBook Pro is the substitution of an identically sized Thunderbolt port instead of the DisplayPort socket.