Wow... definitely neat!!
Would be great for summer picnics! Imagine your family rolling into your 4th of July party expecting to sit out in the sun or under a boring old pavilion and they get an inflatable pub to escape too... SWEET!
I would be worried after spending (I'm guessing) $1000s on it though about it being popped quite easily... Nothing a little rubber cement or a patch can't fix though, I s'pose!
EDIT: Yeah - the one pictured in that link is $49k... $1,600 a day for a rental.