Three questions to ask an atheist

A friend of mine is about to debate an atheist in a public forum tomorrow on the topic "Which makes more sense: Atheism or Christianity?". The planned format of the event provides each speaker a chance to ask three questions of the other (thirty seconds to frame the question and then three minutes to answer it). Whichever side you might identify with, what question(s) would you ask?

Here is a suggestion to kick off the discussion (remember, I'm more interested in hearing questions than answers at the moment): "I find in the best kind of atheism a protest against superstitious explanations and self-interested religion. What do you find most attractive about Christianity?"

For those in Sydney, the details of the event are as follows.

Participants: Alan Conradi (a member of the Atheist Foundation of Australia)* and Michael Paget (Anglican Chaplain to UTS and Executive Pastor at St Barnabas' Anglican Church Broadway)
Topic: "Which makes more sense: Atheism or Christianity?"
Date: Thursday, October 16, 2008
Time: 6:00pm - 8:00pm
Location: Union Theatre Gallery Lounge, University of Technology, Sydney
Cost: I assume it is free, but I could be wrong.

*Based on the definition of atheism found at this website - "Atheism is the acceptance that there is no credible scientific or factually reliable evidence for the existence of a god, gods or the supernatural." - I hereby call myself an atheist (depending what one means by "factually reliable", a slippery tautology).