Zagat, THe Most Trusted Source for Restaurant Reviews has come out with their top ten Barbeque Meccas and Pappy's Smokehouse in St. Louis is rated number one.
Pappy's beat out more famous places known for barbeque like Kreutz Market in Texas.
If you haven't been to Pappy's you really need to yourself in there. 3106 Olive, near SLU. But go early because when they sell out, they close. Lunch.