On Wednesday, we discussed a new iPhone app which helps Catholic users prepare for the act of confession. To Patrick Leinen, creator of The Confession App, the use of interactive media is a natural and necessary evolution for religions that hope to keep up the pace with a world that rapidly embraces new technology.  

But how about Twitter, Facebook and MySpace; how do these social networks fare in the religious experience of the 21st Century?

For the answer, we speak with  Lisa Miller, author of "Heaven: Our Enduring Fascination with the Afterlife" and  Ash Greyson, managing editor of BeliefNet.com. How can religious individuals "sanctify" the tools offered by social media?

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