Does GNOME or KDE have this functionality? to run an HTML directly? under Windows XP, just rename the HTML file to HTA and it would run the file just like a normal application. I've heard Mozilla have it's XUL functionality that does the same, but I could not make it work? Microsoft Longhorn's concept videos run XML file directly. http://msdn.microsoft.com/Longhorn/productinfo/conceptvid/default.aspx Will features like this be on the priority list?