User blog comment:RRabbit42/Cliptastic Countdown/@comment-1331763-20090905013224

According to this article, which I am linking you to below, the "Cliptastic Countdown" episode will air on Monday, October 12th at 8 p.m. (ET/PT):

http://www.daemonstv.com/2009/09/04/fans-invited-to-vote-for-favorite-phineas-and-ferb-songs/