Brian Mclaren wrote a chapter on apologetics in a book which he co-wrote with Tony Campolo, Adventures in missing the point.
What stuck me in this chapter was much of my approach to evangelism and apologetics is already based on Mclarens points. These are::
:: Evolution already been a creation of God's
::"The bible less like evidence in a court case and more like works of art in an art gallery" A pointer to God.
:: Throwing the question's back to the questioner. Eg How would you explain good and evil without God?
:: Look for emboided truth instead of absolute truth, eg how Jesus demonstrated God's mercy.
::Instead of people coming to faith in a linear way, people will move along in a more unpredictable path. Mclaren calls in a spiral. I think the idea of a labyrinth is a better illustration. But his point is the same.