"The usual fanboy rebuttal is that [the iPad] is not designed for what I do." How does stating _a fact_ like this make one a fanboy? This re-reminds me why Dave Winer irritates me. Yes, the iPad does not offer a development environment. Yes, the iPad lacks file-system access. So what? Dave also invokes the classic 'my mom's going to love this' line. I think my mother will too. And I cannot wait to replace her Windows…
Yes. iPad is for consumption not for production. Don't know when some of these guys will realize it and stop making a big fuzz. I don't see the point of it.
My girlfriend (a university professor) is in the process of finishing her first book, and would love to do the rest of her writing and revising on the iPad in Pages, but she doesn't see it as being realistic. She's still really excited about being able to watch Battlestar Galactica on the iPad. (regarding BSG: yes, I am lucky.)
I spend all of my time writing code in Ruby and Objective C. I'd love to be able to get access to MRI, the Rails gems, MySQL and TextMate on the iPad in order to do my work there, but it's just not realistic. And that's ok: because I am unbelievably excited about the web browsing experience and the games on the iPad.
Edit: I amend my comments above with a Tweet from the author of The Ghost Map and The Invention of Air: http://twitter.com/stevenbjohnson/status/11564792495