re: triple ads unit
Please see whatJon Burke said here:
The Triple Ad unit option requires approval by FM [Federated Media] - the advertising partner for that layout. We submit all the WordAds sites to them and if then the sites they approve we ask if they would like to move to the triple theme. http://en.forums.wordpress.com/topic/triple-ad-unit-themes?replies=5#post-922109
More details here: http://wordads.co/faq/
http://en.forums.wordpress.com/topic/triple-ad-unit-themes?replies=8#post-922109