It doesn't matter where you live, you can download from BF without joining. You will be charged 9.99 instead of 6.99 if you don't join.
That's dollars samson! - it's a little less in UK pounds but there is some tax added which has recently gone up due to the increase in VAT in the UK. I've recently had an email from Big Fish to say that they are keeping a good eye on exchange rates & may have to adjust every now & again to oversees buyers who will be kept informed.
If you enjoy Casual Games I would recommend becoming a member of Big Fish as they are a reliable site, are very helpful & seem to get most (if not all) casual games eventually as well as large file adventure games, if you like those, for the same price! At the moment it costs me less than £6.00 for each game as a member! (except for Collector's Editions)