I find it really ironic that I just read through ~90% of this thread on my N800 using the DPAD to Scroll....

Now for my $0.02:

While I like the DPad , I don't think it is the easiest control to use.

The whole time I was reading this thread I kept thinking that a "track ball" at the center of the DPad would have made the scrolling a much more fluid one-handed experience.

I envision a control similar to that of the BBPearl. It seems pretty intuitive: free rolling and push to select.