Teaching the Truth About Hell
http://www.outreachmagazine.com/features/3582-Teaching-the-Truth-About-Hell.html

N.T. Wright: I didn’t originally write a passage in Surprised by Hope on hell, but wherever I went and lectured on it, everyone wanted to ask about it. So eventually I thought, Oh dear, I better try and say something about the reality of hell.
http://trevinwax.com/2008/04/24/trevin-wax-interview-with-nt-wright-on-surprised-by-hope/#section6

The Importance of Hell
There are plenty of people today who don't believe in the Bible's teaching on everlasting punishment, even those who do find it an unreal and a remote concept.
by Tim Keller
http://www.redeemer.com/news_and_events/articles/the_importance_of_hell.html