http://www.medievalengineers.com/ I'm not even sure if they will support multiplayer right away, let alone dedicated servers. I know they are not support Survival at first. The questions is what is the interest in the community once they have multiplayer, dedicated servers that are Survival to host a Medieval Engineers server? The intention would be to run it similar to the Space Engineers server, except any mods that would come out would be those focused around fantasy / RPG elements.
This has caught my attention somewhat more than Space Engineers has. Probably due to my pre-existing in medieval builds, so yeah. I'll deffs give it a shot.