Frankly, we're disappointed. It's 2008, the veritable future, and you still don't have an RFID-based automatic sliding doggie door? For shame! The Plexidor Electronic Doggie Door allows for all that nice canine coming and going with none of the less-nice house robbing a regular flap door enables. Your dog gets to wear an RFID chip on his collar, which lets the door know to automatically slide up when he shows up -- hopefully with a sort of squeegee sound to complete the sci-fi effect. Prices range from $700 to $800 depending on configuration.