A good summary of the current resurgence in philosophical arguments for the existence of God has been posted over at Christianity Today.
God Is Not Dead Yet
How current philosophers argue for his existence.
The article is by William Lane Craig, a leading Christian Apologist.
You can check it out at
* * * UPDATE
You can also check out William Lane Craig's website: http://www.reasonablefaith.org
If you register (no cost or obligation), you can access a full debate he conducted recently in New Zealand. The topic: Is God A Delusion. Dr. Craig offered 5 strong reasons for the existence of God vs. the dreary alternative. It's in the Audio-Visuals section.