I use 1024*768 because I need to have more on screen when I'm doing things, escpecialy with a graphics package or coding with toolbars all over the place. Makes things a bit small, but it's better to use it all the time and get used to it. Even those who use high resolutions don't neccessarily have thier browsers maximized don't forget and many might have a media bar down the left side, so it neccessary to take this into account. I do keep this
as a link on my toolbar so I can quickly resize when testing pages.