The iPhone app for Digg v1 has been updated to be a universal app for both iPhone and iPad. The iPad version offers the same version as the iPhone, just offers a more pleasant reading experience on the iPad's larger screen. Speaking of larger screens, this update also includes support for the iPhone 5's bigger display.
In addition to iPad support, Digg has added a "Reading Sync" feature that allows you to close the app in the middle of a store on one device and pick up where you left off on your other devices. You can also share articles via text and some of the UI elements have been simplified.
Have you used Digg for iPad, yet? The first thing I noticed is that scrolling through thumbnails of stories is a bit laggy. I'm snob when it comes to polished scrolling in apps, so this was enough for me to be turned off and close the app.