And, I'm sorry, but reading your post, that doesn't seem to be the only thing where you look uninformed. I'd really advise you to inform yourself about how web pages work and how constrained they are by the browser before posting such a complete nonsense about AJAX Remote and - by extension - discredit my work along with it.

As a matter of fact all web pages - including AJAX Remote - run FULLY SANDBOXED and as immediate effect of this:

a) can NOT render your phone unresponsive 
b) do NOT have any influence beyond what's displayed in the area of the browser that it runs in 
c) they can in particular NOT crash your phone 
d) they can in particular NOT render your home button unresponsive 
e) they can in particular NOT have ANY effect on your phone's ability to restart

AT WORST - and provided that the browser a web application runs in has a bug - the browser (and only the browser) could crash while executing a web page. Which, on the iPhone, will bring you back to your home screen. And that's it.

It's also worth mentioning that Safari itself *also* runs in a sandboxed environment and does NOT access any parts of the iPhone's filesystem that are critical for booting the phone's OS. No matter how often Safari crashes, it can never have any effect on your phone's ability to boot.

Safari on the iPhone had some general stability issues with iPhoneOS 1.x. Sooner or later it'd always crash after longer, continued use (and bring you back to the home screen) on whichever page it'd currently view. Stability improved with iPhoneOS 2.0 and we haven't seen any more crashes since Apple released iPhoneOS 3.0. We consider the version of Safari included with iOS 4 rock solid.

The only group of people we've heard of who have stability issues (in general, not limited to, but also with Safari) with their iPhones to date are those who have jailbroken their iPhones and/or modified them in other ways. But then, these people know what they're doing with/to their phones. Or so one should think ..

Best regards, 
Felix Schwarz