Installing for FreeBSD will require a little extra something in your db/local.php file.
Paste this: $api_tiki='adodb';
at the end.
Resulting db/local.php file:
<?php $db_tiki='mysql'; $dbversion_tiki='5.0'; $host_tiki='localhost'; $user_tiki='my_database_username'; $pass_tiki='my_database_secret_password'; $dbs_tiki='my_database_name'; $api_tiki='adodb'; ?>
http://www.freebsd.org/cgi/ports.cgi?query=tiki http://www.freebsd.org/cgi/cvsweb.cgi/ports/www/tikiwiki/