Corsix Theme Hospital, or CorsixTH for short, is an attempt to recreate the old Bullfrog game of 1997. The project takes the same approach as OpenTTD, rebuilding the engine but keeping the original Theme Hospital graphics.
Beta 4 of CorsixTH has been released on November 12th, 2010. A number of important gameplay features have been added, which make CorsixTH feel more and more like a game, and not just a sandbox.
Right after the release the team has put up the new forum, hoping to get the community more involved with the project.