Retro Hugos, typically given for overlooked works... but many years after the event.
At this year's Loncon3 convention, the Retro Hugos have been given for the year 1939. This, of course, is long before most of the convention's members were born. But it has given Ray Bradbury a second opportunity to have his works considered for recognition.
Bradbury was on the ballot in two categories:
"Best Short Story" - his amateur story "Hollerbochen's Dilemma" lost out to Arthur C. Clarke's "How We Went To Mars". Perhaps the UK location of this year's Worldcon helped Clarke to win this category...
"Best Fan Writer" - Ray won in this category, where the award is not given for a specific named work, but for a general body of work. Of course, in the late 1930s Bradbury was contributing to a number of fan publications, and was producing his own fanzine, Futuria Fantasia.
I find it quite amusing that Ray Bradbury should win as "best fan writer", particularly since back in 1939 he attended the very first World Science Fiction Convention in New York.
Full details of the Retro Hugo ballot can be found at Tor.com.