I have the musculature of a ten-year-old. Thus, I really want this self-propelled suitcase that holds up to 30kg and scoots at up to 4.8kph.
The electric motor engages when you tilt your suitcase between 15 and 35 degrees, transferring 85% of the weight onto the wheels and off of your arm. Each charge lasts 2 1/4 hours and can be taken up to 2.8km. Unfortunately, the $US1,300 price tag means it's cheaper to rent a dude at $US10 an hour for 130 hours to carry your suitcase for you than it is to buy one. [Hammacher via Random Good Stuff]