Looks very cool! But the kickstarter campaign doesn't promise delivery until 2013. I would say 1100 dollars US (that's the early bird price) is a LOT of money. At $3.50 a gallon that is 314 gallons of gasoline. At 30mpg that is 9,420 miles.
But if it enables a bike trip and that's what you want, I say go for it.
I did see a post very recently on someone's blog about a trailer with e-assist built in that is less expensive and also carries some cargo.
http://www.monetarymusings.com/65/review-ridekick-power-bike-trailer/Sorry I can't remember which Mustachian out there runs this blog but I remember the post!