The videos from the 2010 Ligonier National Conference are now available online for streaming. The title of this year's conference was "Tough Questions Christians Ask." You can find the index of all the videos here. I would especially recommend the following talks:

Derek Thomas If God is Good, How Could He Command Holy War?

Derek Thomas How Do We Know Which Interpretation is Right?

Burk Parsons Is Calvinism Good for the Church?

R.C. Sproul Can We Enjoy Heaven Knowing of Loved Ones in Hell?