Suduro - A blend of Sud(oku) and (Kak)uro

Suduro -- If you already know and enjoy Sudoku and/or Kakuro, there's a website that offers a blend of the two. The grid is filled like a normal Sudoku, but there are gray squares that are filled similar to Kakuro. Sums are provided for just the gray squares in each row or column. In addition, a separate box contains the sum of just the gray squares in each 3x3 square. The extra dimension of clues should make for some fun puzzles. Give it a try.