Hierarchical taxonomy URL's for CustomPress?


From what I've read, Wordpress 3.1 now supports hierarchical taxonomies when you register a taxonomy with: rewrite => array('hierarchical' => true )

I am trying to achieve urls that appear as: http://www.domain.com/tax-name/parent-tax/child-tax, instead of http://www.domain.com/tax-name/child-tax

I was wondering if you had any plans to implement this into a future release? In the mean time, could you recommend a hack to achieve this?