Luke quotes from Superforecasting on his site:

"Doug knows that when people read for pleasure they naturally gravitate to the like-minded. So he created a database containing hundreds of information sources—from the New York Times to obscure blogs—that are tagged by their ideological orientation, subject matter, and geographical origin, then wrote a program that selects what he should read next using criteria that emphasize diversity. Thanks to Doug’s simple invention, he is sure to constantly encounter different perspectives."

wishing to get his hands on this program.

Does anyone know of something similiar, or who this 'Doug' may be? I wonder if this may be as simple as simply asking this man. The book gives 'Doug Lorch' as his full name. Google gives a facebook account as first result, but I have no idea if this is an actual match.