Google has made the official Nexus 7 dock available in the Google Play Store for $29.99. The dock's shipping time is one to two weeks out in the future, but it's at least available from the Play Store. Google has said that the dock is available in Australia, Canada, Germany, Japan, UK, and US.
You can head over to the Google Play Store to pick up your very own, something I'll be doing very shortly. Google's dock allows you to place your Nexus 7 at the perfect angle for "optimum viewing of your Google Play movies and television shows." It will also charge your device through a microUSB port and output audio through an integrated 3.5mm jack.