Appremix has released a major update to its Boxcar notification management app for iOS devices. The new version represents a significant overhaul, sporting a completely new UI design and several new features. Boxcar 4.0 adds Retina Display support for the iPhone 4 and fourth-generation iPod touch, a and now provides a centralized inbox with more alert options. Several additional services are now available as well including Google Buzz, Google Voice…
