http://blogs.wsj.com/wealth/2007/05/08/ for the best read.
Heard this morning on The Wall Street Journal Report, it seems that the limited production is fixed by inclination of the Ferrari chairman, and that is to maintain the exotic mystique of the brand, the rarity, and the perception of the Ferrari as the best.
If they are going to speed up production to meet demand, it would make a lot of their customers happier, they have historicaqlly had to wait about 12 month, now it's about 24 months. Lots of demand from the rich Arabians, and that's new to Ferrari. Somewhere in the Persian Gulf area they are supposed to actually make a themepark about Ferrari's.