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Grease a 10 x 15 jelly-roll pan. Line with wax paper and grease the wax paper. Preheat oven to 350 degrees.
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In a mixing bowl, combine the eggs, sugar, pumpkin, soda, cinnamon, flour and pumpkin spice. Spread evenly over the jelly-roll pan, and sprinkle with the nuts. Bake for 15 minutes.
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After baking, turn the cake over onto a kitchen towel sprinkled liberally with powdered sugar. Leave the wax paper on the cake and roll up the cake (waxed paper, towels, powdered sugar and all). Let cool. In a medium bowl, combine the filling ingredients.
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When cool, unroll, remove the wax paper, and towel, and spread the filling evenly over the cake. Re-roll and refrigerate until serving time. To serve, use a serrated knife and slice into about 1" thick slices.