Now, I'm not a big puzzler myself, but I do know lots of people out there enjoy the thrill of completing a tough crossword puzzle. Red Sweater Software has just announced the release of Black Ink 1.0 (formerly MacXword, Red Sweater Software has been on an acquisition tear as of late). Black Ink downloads puzzles from a number of free sources (including the NY Times). It allows you to print out puzzles for solving on the go, and it also includes a timer so you can brush up on your competitive crossword skills.
Black Ink costs $24.95 and there is a 30 day demo available. Users of MacXword can upgrade for $9.95 (with a valid serial number).