In January 2008, Dunham was voted by fans the Top Comic in Comedy Central's “Stand-Up Showdown”. He is the only person ever to win the "Ventriloquist of the Year" Award twice, was nominated "Comedian of the Year" by the TNN Music City News Country Awards, and has drawn praise from the Dallas Morning News for his technique and timing.

In 2008 a TV commercial for a ringtone featuring Dunham's character Achmed the Dead Terrorist (see Characters on the left) was banned by the South African Advertising Standards Authority after a complaint was filed by a citizen stating that the ad was offensive to Muslims, and portrayed all Muslims as terrorists. The ban angered Dunham, who pointed out that "Achmed makes it clear in my act that he is not Muslim." Dunham saw the ban as an infringement on free speech and a double standard, arguing, "I've skewered whites, blacks, Hispanics, Christians, Jews, Muslims, gays, straights, rednecks, addicts, the elderly, and my wife", and joked, "I'm considering renaming Achmed, 'Bill.'"
via [Wikipedia]