I gave a TED talk on moral luck Saturday at Nanyang Technological University. Probably the most fun example was about some hypothetical German cannibals a century ago, one of whom killed and ate some ordinary people, and one of whom killed and ate Hitler. They both had the same bad intentions, but on a straightforward consequentialist view (plus a few assumptions about history) the Hitler-eater kind of saves the 20th century.
I'm trying to figure out whether to add a section on shared agency to my book. I'd love to have an example where Harold and Kumar want to smoke together, so when Harold brings the rolling papers and Kumar brings the marijuana, they're acting on a joint intention.