Plot: Fifty million Americans do crossword puzzles each week, many in the venerable New York Times , where Will Shortz has been editor for 12 years. "Wordplay" presents an entertaining and informative look at Shortz' work and that of the puzzle constructors with whom he collaborates, as well as coverage of the American Crossword Puzzle Tournament, an annual competition founded by Shortz, that profiles a number of intelligent and ingratiating contestants