According to its website: "The Philip K. Dick Award is presented annually for distinguished science fiction published in
paperback original form in the United States. The award is sponsored by the Philadelphia Science Fiction Society." This year Sean Williams from Adelaide has been nominated for his novel Saturn Returns. (Full list of nominees.) The winner of the award will be announced at Norweson 31, which will be held in Seattle over the weekend of March 20-23, 2008.
[Thanks to Jonathan Strahan for the link.]