GameSpot has the official demo for the Star Wars-themed RTS game, Empire at War available for download via GameSpot (registration required) Worthplaying (patience required) and 3D Gamers (luck required). With some patience and/or luck I'm going to try and grab the download this afternoon and once I "leave" the "office"—I'll check it out and report back.

GameSpot Presents the Star Wars: Empire at War Demo [GameSpot]