Remove tops from beer cans with can opener; lightly oil insides.
Sprinkle baking soda on dates. Heat beer to boiling and pour over date mixture; set aside to cool.
Cream butter, maple syrup, vanilla extract and eggs. Stir in flour. Add nuts and cooled date mixture. Spoon batter into cans, filling only 1/2 full. Bake with cans standing up on cookie sheet, at 350° F for 15 to 30 minutes; look for tops to split and test for doneness.
Do not cut bread for 1 day as the bread may crumble if it is sliced while still warm.
Servings: Makes 8 loafs