Wow, reading this thread makes my mouth water. As a self confessed bbq aholic, some of my favorite BBQ joints include the following.

Kansas City: Oklahoma Joes, Gates, Jack Stack (not a huge fan of Arthur Bryant's)
Lockhart, TX: Krueze Market
Raleigh: The Pit
Birmingham, AL: Full Moon
Denver: KT's
Bentonville, AR: Whole Hog

I could go on and on.....darn, I'm hungry!!