Grease and lightly flour 13x9x2 baking pan. Combine dates and boiling water. Let cool to room temperature. Stir together flour, baking soda and salt. In a large bowl, beat shortening about 30 seconds. Add sugar and vanilla and beat until fluffy, about 2 minutes. Add eggs one at a time, beating one minutes after each addition. Add flour mixture and dates (incl. Water) alternately, beating after each addition. Stir in nuts. Spread into pan and bake at 350 degrees for 30 to 35 minutes.