Jon Stewart wasted no time following Wednesday's epic CNBC take-down, appearing on the "Late Show with David Letterman" Thursday night and continuing the thought. Except to Letterman, he didn't just focus on CNBC — he blasted all three 24-hour financial news channels, presumably CNBC, Fox Business, and Bloomberg. "The thing that upsets me the most, honesty, there are three 24-hour financial networks," Stewart complained.