I have had a T61p for a few months right now with a resolution of 1920×1200. I love it! But what I love even more is my new Lotus Notes mail user interface I laid out with the Composite Application Editor. I actually do not even use my mail file any longer and just use this application I slapped together with the CAE tool.
This allows me to have a full email view and calendar view side by side with a lot of easy to read real-estate.