AFAIK Nokia's plan is to replace the resistive screen with a capacitive multitouch screen in future devices and thus to support only applications which have a finger-optimized UIs.
I think that's a very bad idea, but if you like it, feel free to add it as a solution.

Not only is it also possible to implement multi-touch on resistive screens (google Stantum)
but multitouch forces you to use two hands.
With clever placement of zoom (or volume) buttons there is no need to multitouch and
you can easily use the device with one hand.
Just try the browser in portrait mode and zoom with the volume button on the N900 - much better than multitouch, IMHO.