Instead of writing him, why wouldn't you just spend the extra 1k on a MBP? He's not gonna care if you switch over to another company because he knows that everybody in your family is giving everybody else an iPod and he's rolling in the money. Writing him isn't going to get him to change it so just pony up the $1000 and stop drinking your Starbuck's for a week.
If you are indeed serious, perhaps its because many people don't want a larger laptop. For them, the price, while certainly a negative, is not the reason they want a small FW laptop. Some NEED the small laptop to do their work.
I say definitely write him. I did. Will it help? I don't know, but it certainly can't hurt. In my email, I referenced my history of Apple purchases (which they can look up themselves as everything is registered), and so my statement that I'm not buying for the first time in over a decade until they fix this issue is backed up. I'm generally on a 2-year upgrade history, and my mom or other family member gets my old machine. That has stopped - at least for now - and I'm far from the only one in this position.
Its sad that so many people 1) take whatever Apple gives them and attempt to elevate it to gospel, and 2) think you might as well just give up and not try to affect change, because "they'll never listen anyway".