I'm not following your arguments. If a zip code can 95% of the time uniquely identify a city and state, why make them type it in? Sure it's not "THAT" painful,

I'm not following your arguments. If a zip code can 95% of the time uniquely identify a city and state, why make them type it in? Sure it's not "THAT" painful, but neither are a lot of small things that add up to making a big difference. As for the AJAX / javascript disabled issue: just because it's possible to use AJAX in a way that locks out some users, doesn't mean it's necessary. There are definitely techniques for unobtrusive javascript that fails gracefully, and that's exactly how I'd like to implement this.