I used some great new software called HDR Express on some of my Paris photos, and my friends at Unified Color interviewed me about my experience. HDR Express is very easy to use, very fast and can produce beautiful, realistic results. If you are interested there is a 30 day free trial available, let me know what you think!
Here are a couple of examples, the view from the top of Cathedral Notre Dame and inside the amazing La Sainte-Chapelle church. Direct link with more photos via the Unified Color blog.