For a notion of how cockeyed the cold war and its aftermath look to an Australian, this bubbly comedy, written and directed by newcomer Peter Duncan, is a good place to start. Judy Davis plays a fervent Australian communist who writes passionate letters to Stalin in the early 50s, is invited to the Soviet Union to see him, and appears to go to bed with him just before he dies. Back in Australia she gives birth to a son she names Joe, who grows up to become a radical labor organizer. A spy (Sam Neill) who may also be Joe