I made my swf fit the browser window with the following code
AS3
var sw:Number = new Number(stage.stageWidth);
var sh:Number = new Number(sw);
container.width = sw;
container.height = sh;
addChild(container);
HTML settings
scale: noscale
object width: 100% height 200%
the problem is I can't get a consistent height. ie. I have to set the height in the HTML to various percentages for different screen dimensions (a square screen appears with an extended 'long' swf).