There's no place like home...
Do you enjoy solving crosswords? Then check out Ray Hamel's Crossword Puzzles page. Ray's site includes everything you might want, and it also has the best list of crossword links I have ever seen.
Are you really good at solving crosswords? Then maybe you want to compete in the annual American Crossword Puzzle Tournament. I actually did this in 2003, what a word-nerd I am...
Think you might want to try your hand at constructing crossword puzzles? Then check out CRUCIVERB, aka "The Crossword Constructors Community Center." You should also look at Antony Lewis' Crossword Compiler website. Crossword Compiler is the excellent software that most of us constructors use to create our puzzles.