I made a colour-coded world map of all the zones:
http://www.flickr.com/photos/tm-tm/3549536862/sizes/l/

I put it together for my own benefit (I like being able to see this sort of thing at a glance - it certainly never really registered with me just from reading the countries list how out of place Cote d'Ivoire is in zone 6), but thought others might find it useful/interesting too.

I've only included the countries that are currently on the bmi webpage (so no Iceland, Slovakia, Mongolia, Libya etc).