Earlier today, Keith reported that Delicious Library developer Wil Shipley had barcode scanning on his radar as a future iteration for the late, lamented iPhone version of the popular catalog app. Lo and behold, within a few hours the newest update to the Amazon Mobile app hit the store -- featuring, you guessed it, barcode scanning.
With the new 1.2.8 version of the free app, and an iPhone 4 or 3GS running iOS 4.x, you can quickly scan a product barcode to search Amazon's catalog for matching items. The scanning screen offers a handy bracketing guide to show you where to position your product, and once you get the hang of it the scanning is very quick.