In top of double boiler
over simmering water, melt chocolate. Stir until smooth.
In a small saucepan, combine the coffee with the sugar over medium heat.
Cook just until the sugar is dissolved, then remove from heat. Whisk the sugar syrup slowly into chocolate, making sure the choclate does not lump. Strain through a fine sieve
Freeze in ice cream maker
, until just about solid.
Transfer to airtight container and freeze until solid.