My Treo is usable in direct sunlight but then you can see the grid dots for the digi. But it is definitely usable, no problem. What is the iPhone screen like in direct sunlight?
Capacitive screens (like on the iPhone) should be better than resistive screens (like on the Treo) because they don't have the plastic, deformable outer layer and so avoid the internal reflection that this causes.
Agreed. Excellent screen in daylight. The only time I have an issue is when I play a movie that has very dark backgrounds, like Batman Returns, in direct sunlight. At all other times, the screen is excellent.