There's a handful of software improvements too, such as Twitter and Facebook integration, new functions like dictionary lookup as well as notes and highlights, and it even has an "experimental" WebKit-based browser. In case you're unfamiliar with the Kindle, it's worth noting that it has access to over 630,000 paid books and 1.8 million free out-of-copyright works, and any material downloaded is accessible on iPhone, iPad, PC, Mac, BlackBerry, and Android devices via Whispersync. If you're more into audio books, it also has a text-to-speech option that reads content to you.
The premium model is priced at $189, which includes both Wi-Fi and free 3G connectivity over AT&T's network. Alternatively, there's a Wi-Fi-only model for $139 (which undercuts the Nook Wi-Fi) that doesn't have access to 3G, but can still hop on AT&T's US hotspots. Both iterations will ship to customers worldwide on August 27 in graphite or white, and case options will include one that has a built-in, retractable LED light for late night readers.