Preheat oven to 250 degrees.
Grease a 10 x 3 inch springform pan.
Place chocolate, sugar, butter, and coffee together in a saucepan and heat gently until mixture has melted together and is smooth.
Remove from heat and let cool slightly.
In a seperate bowl, beat eggs until they are well mixed.
Add eggs to melted chocolate mixture, beating constantly.
Pour mixture into pan and bake for 2 hours.
Cool and cut into portions.

Mix egg yolks, sugar, and wine together until the mixture is smooth and pale and forms a ribbon when the whisk is lifted.
Place over boiling water and whisk constatly until mixture has thickened and is creamy.
Refrigerate until needed.
Spoon sauce over individual portions of cake.