I do seem to recall though that when you open a link to the US store, your browser automatically sends you to the UK one. If you scroll down to the bottom of the page on Disney Store UK there is and American Flag symbol and US next to it. Click it and you're in. The page I tried to link you to above was adults T shirts - and there are LOADS of them.
very strange as I was just searching for some myself and I am really surprised they don't have more available, especially in the UK!
I got a really cool evil queen t shirt from hot topic lil while back - they have a UK and US site. There is more choice on the US site but not sure about postage costs:
While its just an abbreviation here it must be more widely used over in the US to mean something else. The Urban Dictionary lists 3 pages of meanings, at least one on there would be enough to have it blanked.
I think they're good quality, and really good value for money, especially for basic things like t-shirts! I've got 2 t-shirts of theres at the moment, and I've had no problems with them. They're launching a collection of disney princess t-shirts on the 25th this month, for the royal wedding, might have to treat myself to one if they're nice.