The Globe and Mail reports that spammers have discoverd how to publish those $0.99 books on Amazon: 

. . . Aspiring spammers can even buy a DVD box set called Autopilot Kindle Cash that claims to teach people how to publish 10 to 20 new Kindle books a day without writing a word.

Good thing it's not quite that easy to generate Android apps, or before long, spammers could be doing the same thing in the Android Market.