Well, I use my FireWire port daily to connect my card reader. I use the express port ( which they removed already to connect esata hard drives).
I connect my mac pro to my laptop via ethernet.
Moving large amount of data around is impossible over wifi. Maybe not in the future, but I work today. There is no way I can work with the footage from my RED camera over wifi.
I'm just telling you this so people can understand the different needs that people have from a laptop. I wish I could use an Air as I travel much, but the lack of connectivity (and speed) makes it very difficult
My real question how you're even bothering to edit massive video files on a 4gb maxed ram machine. Seems incredibly ridiculous to me.