Bed Bath & Beyond offers the Brookstone Rover App-Controlled Spy Tank
for shipping. That's $10 under our mention from a month ago and the lowest total price we could find by $2. The tank can be controlled by an iPad, iPhone, or iPod via a free app. It transmits video and sound in real time to your handheld device and features night vision, photo capture capabilities, and more.
Of note, calling it a "tank" does not imply that it can shoot projectile ordinance, nor be portrayed by Will Ferrell in a crummy Frat Pack movie.