$q = new Doctrine_RawSql();
        $result = $q->select('{p.*}')
                ->from('photographers p')
                ->addComponent('p', 'Photographer')
                ->where('p.city_id = ?')
                ->orderBy('CASE WHEN p.lname < ? THEN 1 ELSE 0 END,
p.lname ASC')
                ->execute(array(35, "foo%"));

Yields SQL like this:
echo $q->getSql();

SELECT [list of fields]
FROM photographers p
WHERE p.city_id = ?
ORDER BY
   CASE WHEN p.lname < ? THEN 1 ELSE 0 END, p.lname ASC

Any idea why my parameters aren't substituted into the query? Thanks!