Your N800 is defective. I have both the 770 and the N800, and the touchscreen work equally well, no problems.

I had similar problems with my 770 a year back: touchscreen wasn't responding on certain parts and the thing crashed a lot (seemingly random) . I send it in for repair and 20 days later I got the 770 back. repaired with a new touchscreen, and working perfectly now!

I really hope the I-phone functions as well as they let people believe in the commercial. But I'm skeptical. The device is REALLY small! It has a smaller screen than the Inet tablets and until I see it myself, I really doubt key input will work well on such a small screen.

I'm also very curious but it will be some time before I can buy it (I live in Europe)