Aardappel has announced his first relatively stable release of Sauerbraten. We've had a whole day and still no maps yet - I'm kinda disappointed.
Go get it. The first decent map I see is going on the front page. Shadow, Staffy, Bltchgranmda, and Nieb posted maps for older versions of Sauer, which they should update for the new version - at least show us some shadow-mapped screenshots.