Joe M has released 'Danger Zone 3'. There are 30 levels that vary in size. Some are quite extensive, some are fairly small. Most of the walls, sounds, and some of the objects have been replaced but the Wolf 3D feel is retained quite well. Code changes include seamless levels and new helpart. Available at http://www.brlowe.co.uk/DangerZone3.zip .
There are some screenshots at http://www.wolfenstein3d.co.uk/danger3_pics.htm .
There are some screenshots at http://www.wolfenstein3d.co.uk/danger3_pics.htm .