A long and very thorough review of the Parrot AR.Drone is over at Toucharcade, a iPhone gaming blog. We;; worth reading the whole thing. Here's just the conclusion:
"Overall the Parrot AR.Drone seems like a very 1.0 device with loads of potential both in future hardware revisions and in future development with the AR.Drone API. Improved battery technology, higher resolution cameras, and more powerful sensors to allow for higher flights are all things I would love to see in future models. Currently the only companion app available for the AR.Drone is the Free Flightapp, but Parrot has promised other apps such as augmented reality games where two players with their own AR.Drones can have virtual dog fights, and other similar things. None of these were available at the time of this review, but I definitely can see the amazing potential for future software development."