MultipleStreams, a worldwide dealer of used books, CDs and DVDs, has released version 2.0 of its YouSell application for iPhone, incorporating bar code scanning.

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.

As soon as Apple announced its newest creation, the iPad, app developers such as NearbyNow and Big in Japan announced plans to extend their products to the platform.

Big in Japan, developer of commerce app ShopSavvy, launched a video contest inviting consumers to share their on-the-go shopping experiences for a chance to win Google’s Nexus One or Apple’s iPad.

Big in Japan Inc., the developers of ShopSavvy, are adding augmented reality and QR code support to the application in an effort to expand consumer use of 2D bar codes.

Big in Japan, a factory for mobile applications, has updated its ShopSavvy iPhone application making it easier for consumers to scan bar codes.

While actual mobile payments are still nascent, more consumers shopped on Black Friday using their mobile phone than ever before.

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