woah, that is so totally cool. Expensive -- more than a month's rent and utilities combined, but seriously cool.

Also, they sell them in my country -- even in my city, and the webpage says they have a promotion thing where you can borrow it for a night and then take it back the next day for free -- under the idea that a person would be sold on the idea and wouldnt want to go back to their old vacuum cleaner. So, basically, I could get my carpet cleaned for free, and then give it back. If the thing would clean it thoroughly (and I'd be willing to babysit it for a night if it needed to be emptied frequently), it's possible that it could get enough of the ingrained dirt out that i could make reasonable progress with regular vacuuming.