I suspected that South Park would be going HD soon due to some evident cropping in the most recent batch of episodes, and it turns out this is true. The bigger news is that the old episodes are going to be re-rendered in 16:9 HD as well.
http://www.southparkstudios.com/news/3581
The Comedy Central press release reveals that The Daily Show and The Colbert Report will also be going HD in the near future. I'm assuming the very first episode of South Park will remain largely untouched.
http://www.southparkstudios.com/news/3581
The Comedy Central press release reveals that The Daily Show and The Colbert Report will also be going HD in the near future. I'm assuming the very first episode of South Park will remain largely untouched.