Omz:software has released a major update to its popular NewsRack RSS reader for the iPhone and iPad adding iOS 4 support and several additional features and improvements. NewsRack 2.5 now supports background task completion and fast app switching on multitasking-capable iOS 4 devices and provides high-resolution graphics for the iPhone 4 Retina Display. A new slideshow mode is also now available for iPad users. Additional improvements include much…