You're right. That was one of the main objection against this challenge, from what I read on many forums. Well, the really convincing test is to use Arc for real. I wrote a small webapp with Arc and I never wrote such an app so fast. Quite amazing for a language I didn't know.
Point taken. This stuff about parse trees and who-wrote-what is after all just an academic argument. You're absolutely right that it's what we can write and how he enables us to write it in the end that makes this stuff all so interesting.
Anyway, keep going everyone. Those submissions are rockin' on. I've got my mind wrapped around a pretty perversely heinous challenge response that I may get to in the next couple of days. Keep your eyes peeled!
P.S. Did anybody notice that those class="page" attributes are unnecessary in my HTML/CSS code above? Just checking. Looks like I forgot to remove'em before posting.