Jon Stewart is back at work on The Daily Show for Comedy Central after three weeks of vacation. But what if he didn't come back? After all, one of these days, he won't. And with all of the talk over on NBC about talk show hosts (as well as the recent announcement that Charles Gibson would retire from the real TV news anchor desk at ABC), well. It got some people, myself included, to thinking. And you now what they say, thinking leads to blogging. Here's a post about 14 potential replacements for Jon Stewart on The Daily Show to get you thinking.