The mayday pack is set to 0.28.181.39e if i look into the release notes of the latest version on his site.
Dwarf Fortress is currently version 0.28.181.39f very freshly released
http://www.bay12games.com/forum/index.php?topic=22634.0
Anyways, there are some
funny challenges you can set for yourself while playing Dwarf Fortress.