Of those of you who have already upgraded from Office v.X to Office 2004, what are some features that stand out as really useful and worthy of the upgrade cost? How is performance of Office 2004 as compared to v.X? Any other comments would be greatly appreciated. Since I know some smartarse will respond, "Download the demo." I am going to go ahead and say that I have already done that. Still, just like any app, there are features and such that you don't discover until someone happens to mention them.