So far there's no word that the Omnia will be released with US 3G. Sad, I agree.
I think the screen resolution is perfect, personally. VGA at 2.8" is the higher res option (Diamond, Touch Pro, E-TEN Glofiish X800), and that's really hard on the eyes for web browsing and it's harder to control the smaller UI elements with the finger. The widescreen display really reduces side scrolling, which is the most annoying part of mobile browsing.
And yes, there's no substitute for a hardware keyboard for heavy texters and email users, no matter what Steve Jobs says .