This is my new favorite lil’ class:

public class BitmapSprite extends Sprite
{
protected var bitmap:Bitmap;

public function BitmapSprite(bitmapData=null, pixelSnapping=”auto”, smoothing=true){
mouseChildren = false;
bitmap = new Bitmap(bitmapData, pixelSnapping, smoothing);
addChild(bitmap);
}

public function get bitmapData():BitmapData { return bitmap.bitmapData; }
public function set bitmapData(value:BitmapData):void {
bitmap.bitmapData = value;
}
}