MadTV is on every day on Comedy Central. (I'm watching it right now!) I don't think it has been canceled.

This is from Planet MadTV posted on August 14, 2008:
"MADtv returns for a 14th season of off-the-wall humor and side-splitting laughs. Keegan-Michael Key and Erica Ash are "Barack and Michelle Obama" and they join Bobby Lee and Arden Myrin as "John and Cindy McCain" on a spoof of SO YOU THINK YOU CAN DANCE: PRESIDENTIAL EDITION. The McCains try to impress the judges with their waltz as the Obamas try to win votes with their hip-hop number on the season premiere episode of MADtv airing Saturday, Sept. 13."

In fact, I think I watched it the Saturday after the VP debate.

Karen