iPhone killer I really dislike that comparison.
Nokia has built what I believe to be a device with really wide appeal, a good example is my colleague in the office he said "wow that's nice" as soon as he saw it and he is NEVER impressed with phones! He is now checking with O2 to see if he can get one.
The 5800XM will appeal to loads of young music conscious consumers who do not want the costs associated with the iPhone (And even more importantly their parents who will be buying it!)
The N97 is a business orientated device the iPhone is a non technical consumer orientated device they are not IMHO chasing the same customers.
I say the 5800XM is NOT an iPhone Killer it IS a market winner!