New features on the site

Anything that doesn't fit in the other forums

Any other math / number / puzzle / etc. related topics

For questions and answers about how to solve the puzzle

For when you want to discuss a specific Calcudoku or Killer Sudoku puzzle
(for example, "the 8x8 difficult of Thursday 17 Nov. 2011"), or for
posting puzzles you designed yourself.

For discussion of the puzzles against the clock, their scoring, strategies, etc.

Report anything that's broken.

For discussion of the site's Killer Sudoku puzzles.

For discussion of the site's Sudoku puzzles, creating Sudokus, solving strategies, difficulty levels, etc...
You can also post your own Sudoku puzzles and puzzle variants here.