I share the same response with Alex. It has become an additional device rather replacing my laptop or smartphone.
I did get balzy and decided to leave the laptop at home for DD9 and only taking my ipad. I didn't miss my laptop and was able to get what I needed done right from my ipad.
For me the ipad IS a media consumption device and not so much something I "work" on. It's decent for quick typing, catching up on reading, RSS, browsing (though it needs real tabbed browsing), movie watching, etc.
Hit the coffee shop - I take my iPad. Sitting on the couch at home getting into some heavy email and forum discussions - my laptop.