That's interesting you mention the Tiger tale, Jimpy...why has that not been collected yet?
I assume he doesn't like it for one reason or another. When Arthur C. Clarke put out a complete collection of all his short stories when he was about 85 years old he had quite a few stories that had never been collected and they generally fell into three categories, stories that were later incorporated into novels, ones that he just didn't like and ones that just slipped through the cracks and got forgotten. Looking at Stephen King's short stories list on Wikipedia he has stories in all those categories too. Let's just hope that we don't have to wait till Stephen is 85 to get them.