This integrates a htaccess password popup with your board. Members will be able to enter their login/password for the board into the htaccess to gain access. When their password is changed on the board, their htaccess password will automatically be changed as well. You can turn it on or off from the cp, as well as enable/disable a registration login/pass so people can register.
This is beta because I am not sure i have pinned down all the places/ways a member's password can be changed.
http://www.jordodesigns.com/UBBhtaccess.zip