Complete turnkey puzzle/brainteaser (can easily be modified for many other things - poetry, ghost stories, jokes and much more for a little extra cost, please PM if you'd like this) website like Zuzzle.com.

Password protected admin area includes built-in FAQ manager, add/edit/view/delete puzzle, add/edit/view/delete puzzle category, edit/view/delete members.

Website includes random puzzle, view puzzle by category, rate puzzles based on how fun and how hard, top members by score (puzzles submitted and puzzles rated).

Membership (MD5 hashed passwords stored in a cookie) features include registration / email verification / password generation / change email address / change password / contact admin form mailer / submit puzzle form mailer / cancel membership. Member usernames may also be changed by admin.

PHP4/MySQL required. Full installation included in the price. Website design extra if you want it.

This is a script by Starsol Scripts that isn't actually for sale on Starsol Scripts yet. When it is you will be able to get all future updates of the script from the Starsol Scripts website at no extra cost.

Demo:
http://www.zuzzle.com/

$35. PayPal, E-Gold, MoneyBookers, NetPay, E-Bullion.

Cheque and money order in almost all currencies (negotiation fee will be needed).

UK bank transfer - only £18.

Please PM me if you want more information or would like to buy.