Thanks for your replies everyone. Some good stories/collections I've not heard of, will definitely be trying to get hold of some of them, especially Arthur C Clarke; always meant to get a hold of his stuff, even if I'm not a huge sci-fi fan.
Thanks Essiotrot for the Truman Capote suggestion; I haven't read anything by him, but saw the film with Phillip Seymour Hoffman and am certainly interested.
It is a shame though that so many people nowadays (particularly in the UK; less so in North America and Europe) don't like short stories. I can understand why some people want to sink their teeth into something more expansive, but I think short stories are so much fun purely because in their brevity they still manage to conjure up worlds and ideas just as important or enlightening as those in bigger books, but without all the extra padding that comes with novels. Even if they don't last as long, I find them just as memorable and effective.
But then, admittedly, I have quite a short attention span, so that probably plays a large part in my enjoyment of them too.
Jim