Nexus 7 Dock finally hits the Google Play Store and is already sold out

The Nexus 7 Dock finally hit the Google Play Store today, but its appearance was short-lived as the accessory is already sold out, or "temporarily out of stock" as the page says. When the dock was available, it was just $29.99, and it seems that price was too attractive for customers. That, or Google still can't quite figure out this whole supply/demand thing with physical products.