There are two speakers for some decent stereo sound (not one as originally thought, according to an iFixit teardown), and the iPad Mini uses the new lightning connecter port.

The cameras on the iPad Mini aren't as good as the iPhone 5, but they are exactly the same as what you'll find on the newest iPad. Taking a photo on the 10-inch iPad has always seemed awkward, but holding up an iPad Mini to take a quick video feels a bit more natural.