Robert King, the Jehovah's Witness podcaster and webmaster going by the title The Watchman (or e-Watchman), answered an atheist's email duing one of his podcasts. In it, he tackles subjects which apparently turned the emailer from a Jehovah's Witness himself into an atheist. Thes subjects include slavery in the Bible, a few odd commandments found in Leviticus, and the story of Elisha and the bears. Tackled in such a way as to build the faith, the Watchman is confident by the end of his podcast that he has shown atheism has no future.
Part 1:
http://www.youtube.com/watch?v=mgkIx7wdaiw
Part 2:
http://www.youtube.com/watch?v=SR6JxVLnVyU
Part 3:
http://www.youtube.com/watch?v=wy8oir3BwtM
Part 4: