I returned my iPad too a few days after launch. Thought I had too much money into something that was promising but mostly a net surfer.
iPod already did music. I watch video on my big screen. Don't care about it on the iPad. Ipod was fine for occasional car trip or plane trip.
Typing sucked. Very annoying. Would have to shell out at least $100 for keyboard and case if not keyboard dock to remedy this.
Browsing was killer app, but checkerboarded too often. And didn't seem designed for iPad as much as it could have been.
Mail was pretty good.
GAmes were mostly meh. Touch screen isn't meant for most games. And I have enough games on console, computer etc.
Only had 256mb memory. (or at least that annoys me now.)
And so I returned it. I will probably wait until at least version 2 now. Although lately I've been tempted to go back. Software has improved quite a bit. And 4.2 is around the corner and looks to improve the experience quite a bit.