A quick list of things I would like the iPad to have: multitasking, flash support, direct usb in/out, direct to hdd storage that is shared across apps & accessible if you dock it with a computer, an elegantly-executed photo-frame style pop-out stand so you didn't necessarily require a dock or their fucking ugly bag/stand contraption to stand it upright, a user-facing webcam so you could videochat with it, the ability to make phonecalls with the 3g version (especially with a bluetooth earpiece)
In fact, most of those are not "would like", more like "expected". Flash was always going to be left out because the iPod, iPhone and now iPad are all content-delivery systems first and a consumer device second. Flash takes control out of Apple's hands, so it's never going to get into any of their devices without extreme restrictions. Everything else though? Come the fuck on.