Not directly related to hcisec, but a very interesting idea with a good insight. I wonder how secure it is in practice, since it seems easier to guess a word than to try all numbers.
"On March 10 at the NASDAQ Market site in New York City, Staples held its Invention Quest™ final judging event. The winner is the WordLock™ -- a combination lock which uses easy-to-remember words instead of numbers."
Step 1: Start with your list of words based on your theme. List can be any 4 and 5 letter words.
Step 2: Unforgettable. Software program takes list of words as input. Creates list of final wheels with 10 letters per wheel. Maximizes number of word combinations.
Step 3: Ready to manufacture