Matt Dillahunty, president of the Atheist Community of Austin and one of the many and most renowned hosts of The Atheist Experience, is known for his ability to reason, and systematically hand theists their own credulous asses on a silver platter.
The videos below are parts 1 and 2 of Matt completely dismantling the arguments posed by a devout Christian, followed by a fantastic rant about the moral inferiority of the God of the Bible, and how Christians are generally unable to think for themselves. The rant starts at about the 2:30 mark in the second video, but I highly recommend watching the first in its entirety in order to properly set the stage for his rant. Enjoy.
The atheist community needs to make this man more famous.