No native 1440x900 support, 1280x800 cuts off the bottom of the screen instead of letterboxes it, and my any resolution over 1600 vertical introduces the VATS delay bug where it takes a second or more for the percentages to show up and be able to pick a target.

1440x900 seems to stretch the screen off massively to the right so I can only see the left hand half. Is that the problem you experience as well?

The options won't even allow me to select 1440x900. It isn't available.

That's weird, I play in 1440x900 just fine. You are changing the aspect ration in the launcher to 16:10 widescreen right?

Yup. I can play in 1680 but no 1440. No option for it. Under that everything is small letterbox 16:10 ratios.