Tell us what exactly you want to use either for?

First the iphone does not have 3g and it is confined to edge speeds. no idea about the krzr but you would be better of to have a 3g compatible phone.

Well the nokia can do almost every thing except for multi-touch and accelerometer, which i really dont think are that useful. Wheras the nokia can do much much more if you have the interest and passion to make it do them.

Of course if you like eyecandy and pretty much will stick to some video and audio the iphone will suit you more.

And also remember that the iphone cannot have more than 8gb with 1 gb almost taken up by the os. Where as the n800 can at this point go up to 64 gb in the future. ANd you can always buy a 15$ nokia battery and double the power.

Tell us what exactly you want and we can tell you how exactly each one fares.