Worth checking out, because of some great tidbits on iphone app usage and free vs. paid apps. Go Andrew Chen for finding this, and for the guys at Pinch Media for putting it together.
http://andrewchenblog.com/2009/02/19/great-iphone-preso-on-appstore-retention-curves-pricing-strategies-engagement-metrics-etc/
A generalist in every (positive) sense of the world.
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