Posit Science has just started offering good information on Brain Fitness in their site.
Including a good article on the “Crossword myth”, which we touched on 2 weeks ago with Brain Coach Answers: Aren’t crosswords and sudoku sufficient brain exercise?.
A number of sites and blogs, including us, may slightly disagree with their claim that “This free website is the first of its kind”, but they do offer good content for this nascent field.
You can also check there an assessment for auditory processing speed they developed for their Brain Fitness program.