I work primarily off a 26" monitor and then I have a 15" dualmonitor, so I can drop and drag my websites to make sure they look good in both small and large screens.
When I am working on screens using php runner, I typically make my changes and then go thru the long process of build and upload to check my work, which really slows me down because of the time it takes when building a big project.
I was thinking that it be cool if one of the two features were available:
A. Have in the tool bar of the visual editor a drop down or box to type in a pxl width - say like 740 and then the window of the editor changes to that width.
or
B. Have a preview button that takes the page your working on in the visual editor and pops it in IE, Firefox or your default browser and shows you it without having to do all that uploading.
Just an idea, I am sure someone has already thought of it
Kim