Ravi Zacharias is one of the best Christian Apologetics around. You can find out more about him here;
I support his work and Ministry. I want to one day attend one of his summer apologetics seminars.
For those who are out of the Tower but still believe in God, Ravi has some wonderful sermons about issues that people struggle with regarding God, the bible, Jesus Christ, Sin, among others. You can hear a few of these sermons for free here; (I think there are 2 of Ravis here)
http://apologetics315.blogspot.com/2007/10/16-best-apologetics-podcasts.html
If you are interested in his sermons you can find them at christianbook.com. You can preview them before you buy. Here is the link for Ravi's sermons and books. I like the books but the sermons are much better. Ravi has a great gift for teaching.
Anyway friends, Enjoy! Peace, Lilly