Purely for entertainment:

The ESPN Playoff Machine

For what it's worth, it wasn't very hard for me to put together a scenario that has an 11-5 Bengals team flying across the country to play a 9-7 Raiders team in the wild card round. In fact, I just put my best guesses in for every game for the remainder of the season and that was the first scenario it spit out. More importantly, basically any realistic combination I plugged in had 10 wins getting us a playoff spot. Assuming we take care of business in the 3 "should-wins" - Cleveland, St. Louis, and Arizona - that means taking 1 of 3 from Pittsburgh, or Houston/Baltimore at home. Should be an exciting final 6 weeks.