These early screens and concept art trickled out of Lucasarts/Bioware's steely grasp after their Big Announcement and Kotaku Jedi AJ Glasser uploaded them instantly using a combination of the Force Upload and a fast wifi link.
This concept gallery shows early Jedi/Sith character designs, a nice view of Coruscant that wouldn't look out of place in Episode 3 and two very similar monsters.
Check out the link to see how the artists' designs have been translated into polygonal reality.
First impressions - those lightsabers look a bit chunky. Maybe people were shorter back in the Old Republic.