Award-winning children’s science writer Seymour Simon is monetizing his first mobile application called “Science Fun To Go” using in-application book purchasing via eBay’s PayPal.

PayPal has launched the second PayPal X Developer Challenge to encourage the development of commerce-enabled applications using its platform.

PayPal has launched its Mobile Payments Library for the Android operating system, giving developers a way to integrate payments into the applications they build.

PayPal, a subsidiary of eBay, announced that its Mobile Payments Library is now in open beta and available to developers everywhere the Apple App Store is available.

Big in Japan, the Dallas-based developer of mobile application ShopSavvy, will use PayPal’s new Adaptive Payments APIs for mobile commerce.