I'm still waiting to hear from someone what the ultimate point of these petitions is. Do people think Apple is going to redesign the MB this week and release the FW version next week, or even next month?
Maybe they will listen, who knows. But even if they do, it won't be on the shelves for at least 6 months, and probably more like a year. A petition does not change that time frame.
Also, those people screaming for FW on the MB probably have perfectly useable computers with FW already. If they have them already, how many of those people are upset because they need a new computer NOW, and how many are just being noisy for the sake of it?
If Apple made a statement tomorrow saying a FW MB was coming in 6 months, there would be a whole new swell of pissed off people asking for it even sooner.