My 2 cents for Jens:
Prio 1: Make USB standard. If not, make at least one PS/2-port standard for external PC keyboard for those with broken A500/A1200 keyboards or those who wants to stove away the computer.
Prio 2: Remove parallell and serial ports as they are replaced by USB (see #1). For those who really needs par/ser they can always buy a clock port expansion for that (and you get back some of the money you lose on making USB standard).