I am in the UK and just attempted to buy Lightroom, I didn't actually go through with it becuase Adobe are charging 21% VAT if you buy the download and 17.5% VAT if you ask for the box to be send to you. I just cannot understand that policy. It only works out at about another £5 but it gets right up my nose. Hopefully when I calm down, I will revisit and buy it as I think Lightroom is an excellent product.
PS. The MACWORLD07 promotion code did not owrk for me eithers so, it does appear to be USA specific