Dorven Realms is a converter from Dwarf fortress world maps (Not forts!... yet...) into playable minecraft worlds.
To use, simple export Elevation, Elevation with water, and Biome maps from legends mode, and load the files into the program, chose the borders of the area that you want to use for conversion, and generate the world. Depending on the world size and settings used, it can take anywhere from a few minutes, to a few days.Download
Values between 4-8 for blocks per embark tile work well. 4 gives steeper slopes, while 8 gives more extensive biomes.
Cave height and width can change the feel of the caverns quite a bit. The default values give results that feel closer to DF caverns, but increasing height may be more to some people's taste.Minecraft Forums thread.