Klingel is trying to land younger subscribers by stuffing subscription cards in phone books, catalogs and small-town Sunday newspapers.

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This is a revenue opportunity for virtual schools and specialized portals that offer everything from free advice, reading lists, worksheets, books and CD-ROMs to subscription K-12 packages.

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Educational and professional publishers have long seen the value of the subscription model for professional education (see: Safari Books Online, for one).

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For the first time in Reader's Digest history, subscription cards for the venerable magazine are fluttering like confetti from more than 150 million telephone books, small-town newspapers and popular catalogs.

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According to The Wall Street Journal, Amazon will soon launch a subscription-based book service, charging a monthly fee for access to a library of e-books.

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The latest BMW Approved Apps include Audible (downloadable audio books and other spoken-word content), Glympse (location sharing), Rhapsody (subscription music service) and TuneIn (Internet radio).

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