The recent 2011 Cannes winners can be seen here at IMDB, a complete list

All Seventy-Eight Cannes Film Festival Palme d'Or Winners

1939 Union Pacific  U.S. Director Cecil B. DeMille

1946 Torment Sweden Director Alf Sjöberg
1946 Lost Weekend U.S. Director Billy Wilder
1946 The Red Earth Hungary Director Bodil Ipsen & Lau Jr. Lauritzen
1946 Lowly City India Director Chetan Anand
1946 Brief

Producer’s Guild of America Awards 2009

[These pretty much echoed the Golden Globes and Critic's Choice awards]

Movie: Slumdog Millionaire
Animated Film: Wall-E
Documentary: Man On Wire

Long Form Television: John Adams
Episodic Comedy: 30 Rock
Episodic Drama: Mad Men
Non-Fiction TV: 60 Minutes
Live Entertainment/Competition TV: The Colbert Report

They should combine several of these shorter

Golden Lion (Best Film) Winners at the Venice Film Festival (1946-2008)*:

1946 Best Film The Southerner Country: U.S. Director: Jean Renoir
1947 Best Film Siréna Country: Czechoslovakia
1948 Best Film Hamlet Country: U.K. Director: Laurence Olivier
1949 Best Film Manon Country: France Director: Henri-Georges Clouzot
1950 Best Film Let Justice Be Done Country: France Director: André Cayatte
1951