It appears the Flash Player engineering team is [making progress on 64-bit Linux support][1]. There are no details yet on when this will ship. But I'm sure [they could still use your help][2].

 [1]: http://thebackbutton.com/blog/73/64-bit-linux-freebsd-flash-player-exists/
 [2]: http://www.jamesward.com/wordpress/2008/05/16/where-is-64-bit-linux-support-for-flash-player/