Thanks for the mentions, everyone!

It would definitely be cheaper to get a TW-Bents bike from a more local dealer (like Flying Furniture), since shipping such a large box is prohibitively expensive. I'm surprised the $400 price tag wasn't higher!

I have a friend in Oz who is/was thinking of becoming a dealer for these bikes, but I don't have his email address handy. I'll PM it to you if that plan was successful.