With JavaScript turned off (an essential security precaution), no text is visible at all, which is a bit of a problem.
> I mean the site comes in at around 500kb transferred. That's not small, but it's also not obscenely large.
The actual content on the page really isn't that large. I got too bored to actually complete this, but you can see an example of what it could have looked like at http://pastebin.com/DBgK4Tv9
It could have progressively enhanced itself, taking the plain-text HTML page, parsing out the choices in the em tags (which could of course have had classes attached to mark them as choices, or even to indicate classes of choices, e.g. 'day-name'). It would have been a perfectly useful tool for people without JavaScript; it would have been perfectly useful printed on a page.
And, frankly, it would almost certainly have been a lot smaller than 500K.
That doesn't take away from how cool it is: the author did a nice, exhaustive job (so exhausted I got exhausted trying to recreate it). He should be commended for it. But we should all reflect on how we got into a situation in which the easiest thing for him to do was the wrong thing, and how we can instead get into a situation where the easy thing is the right thing.
