Just in: Nikon SU-4 TTL flash slave coupling unit. These are basically amazing: http://www.nikonians.org/html/resources/nikon_articles/other/su-4/the_su-4.html. $49.

Just in: Nikon SU-4 TTL flash slave coupling unit. These are basically amazing: http://www.nikonians.org/html/resources/nikon_articles/other/su-4/the_su-4.html. $49.