Optimal width for 1024px resolution?

“Let’s face it: The jump from developing for 800×600 to 1024xn is inevitable; not only inevitable, but just around the corner, too. Many of you are considering the jump. Some of you have already leaped. I suspect that some time in 2007 most of us will knock out comps optimized for 1024px resolution rather than 800px if we’re not doing so already. But perhaps just as important as when it will happen is how: What’s the proper width for a layout optimized for 1024?”