If you literally mean "legal," I can't imagine that spoofing an iPhone is illegal. (And having been a lawyer, I have a pretty good imagination in that arena.)

(But maybe I missed a joke?)

So please include it! (Actually, I'm not sure it's worth including. If it's worth using the iPhone spoof, it's worth having it readily toggled. But I don't see much advantage, since you've made the browser work so well for almost all full-fledged sites.)

I changed to the user_agent in your link, and I still have the same problems. Not only can I not look at the bottom of a GMail inbox page, I can't even look at the middle without it automatically scrolling all the way back to the top.

The webpage also doesn't make use of the NIT's screen width, but I figure that's to be expected.