Thanks S Gharibian for the heads up on this one. bLaCKcOmB over at XTechNet has posted 20 screenshots of Macromedia Dreamweaver MX that he made. He said in his post that the interface is improved, and is similar to FlashMX's UI. He also added that Dreamweaver MX supports editing of almost every type of webpage format, including MS ASP .NET.
Screenshot: Dreamweaver MX (XTechNet)