I believe the overwhelming number of people who wanted one, got one right away. Although, sure, now they can get their Significant Other a phone as well.
iPhone still doesn't do everything it ought to do. So it could sell for $100, and yet people who need a feature it's missing, still aren't going to get it. If/when Apple gives it a huge software update, AND open it to third party apps, then this could change.
I think the Touch non-phone iPod version will sell pretty well, though.