Check out the Exploring Faith Book Club in the Beliefnet Community! They have many interesting discussion threads going on. Here is a description of the group:

Have you always had questions about Christianity, Islam, or Judaism that you were too afraid to ask? Now you can get your questions answered, and meet people of a wide variety of faiths, in this group led by the authors of the bestselling book THE FAITH CLUB. The book tells the story of Priscilla, Ranya, and Suzanne: three women of three different faiths trying urgently to understand each other in the wake of September 11 and its aftermath. They’re not afraid to ask each other the hard questions about the other faiths — and you shouldn’t be either. THE FAITH CLUB is the November 2007 featured book of the Exploring Faith Book Club. Sign up now to ask your questions and join the conversation!
Pioneering, timely, deeply thoughtful, and full of hope, The Faith Club’s caring message will resonate with people of all faiths. Join the discussion about this book now!

You can also read more about forming your own faith clubs if you visit their website, www.thefaithclub.com.