Sega has posted the Dreamcast map pack for Quake III Arena on their Q3A site. These are the modified maps that shipped with the Dreamcast version of the game, and so theoretically this means PC gamers can play against Dreamcast players. A couple of quick caveats: the FTP site is woefully overcrowded with its teeny 50 user limit, and in order to use these maps you'll need Q3A version 1.16n. Thanks Stomped for the tip. Update: A mirror is available at 3DDownloads.