AFAIK you are not suppose to be charged VAT if you are shipping to an non-EU country.
You however might [will] get hit with import charges.
Though sometimes they will charge you VAT and there is a process to get it recouped - it has never happened to me, so I have never done this. Nor do I remember which department you have to contact. I just remember someone complaining about it while back and said it took him months to get it back.