Here they are, the 2008 Nebula Awards:
2008 Nebula Winners
Novel - Powers by Ursula K. Le Guin
Novella - "The Spacetime Pool" by Catherine Asaro
Novelette - "Pride and Prometheus" by John Kessel
Short Story - “Trophy Wives” by Nina Kiriki Hoffman
Script - WALL-E by Andrew Stanton and Jim Reardon and Pete Docter
All of the short fiction is currently available on the web and the links will take you to them so you can check out the stories yourself.