If you're in the market for a new Apple device, it's a good idea to see that last time the product was updated.
Before I make an Apple purchase I check the MacRumors Buyer's Guide.
MacRumors is an active community focused on purchasing decisions and technical aspects of the iPhone, iPod, iPad and Mac platforms.
They keep track of the last time a specific product was released and let you know if based on Apple's release history, a new version will be coming soon. They also provide a summary of currently available rumors for each model.
The MacRumors Buyer's Guide is based on rumors and speculation and provides no guarantee to its accuracy.