I can't share any specific data either for the same reason, but one area to look at is the price point. Market research we have on similar audio products (albeit ones with less "techy" knowledge required up front than the iPod), shows that about half as many women as men are interested in the product concepts. Those women that like it seem more committed, as the total numbers drop off as soon as you put a price on it - but as that price goes up, the men drop away much quicker and soon there is no real difference between male and female interest levels.

Men it seems don't have the staying power or the urge to spend!