Commercial space flight is almost here, but being one of the first to try it would be like being an early user of all the new electronic toys: You pay three or four times as much as the people who wait for Version 2 or 3, and you have to put up with all the bugs that haven't been worked out yet. My sister says she'd really like to take the trip if she had the money, but it I think it's way too much money just to experience a moment or two of weightlessnes: