So here's a link to the various clips of Colbert's "Ching Chong Ding Dong" character, (including his response to the criticism) followed by a link to the comic I posted about it. (It's at the bottom of the archive page for Secret Asian Man.)
http://ccinsider.comedycentral.com/2008/11/21/stephen-colberts-7-best-ching-chong-ding-dong-moments/

http://www.secretasianman.com/archive.htm

Here's that "behind the scenes" article about Daily Show interviews written by the president of the Freedom From Religion Foundation.
http://friendlyatheist.com/2010/04/14/behind-the-scenes-ffrfs-dan-barker-on-the-daily-show/