I think the iPad is for people who have everything.
It is easy to see why they don't have SD or USB. If you want more storage you buy the bigger one. (o: It might be a simple thing but it typifies the reality that is Apple.
Flash is still missing from the browsing experience.
But I agree with Bloodline on one thing. Tailoring the OS/Software to the hardware is the way to go.
Maybe they could collaborate with some partners out there though, so they get some corporate IT friends otherwise things are going to get very lonely.