We have a new one in England called Wife Swap
Wife Swap latest: show 3
Kellie insists her family have no meat, no diary products, no tea or coffee. Their top meal is marinated tofu followed by vegan Thai curry. Justin, her husband for the next two weeks, is a hyper-caffeniated junk food addict.
It is actually quite good - check out the web site for the comments:
http://www.channel4.com/life/microsites/W/wife_swap/