Well, the OP's N800 is clearly defective, so the 'comparision' w.r.t. load times, screen etc. is moot. I'm sure the iphone is nice, for a phone. There are a couple of things though:
- Sealed battery compartment
- 320x480
Those are exactly what I moved away from when I went from Palm to N800.. in addition to the other goodies like 2xSD. But the clincher is the screen resolutions. They simply can't compare, I can't use my Palm for what I can use my N800 for. Anyway, I'm sure the iphone is fine if you use it as a phone, with the occasional movie or whatever. No good for web browsing, that's certain. Heck, 640x480 doesn't cut it either (read vga PDAs).

In any case, they can't be compared, more than you can compare, say, a motorcycle to a car. You can try, but it doesn't make sense.