This is the best I've found so far:
"Can people receiving the nasal-spray flu vaccine LAIV (FluMist®) pass the vaccine viruses to others?
In clinical studies, transmission of vaccine viruses to close contacts has occurred only rarely. The current estimated risk of getting infected with vaccine virus after close contact with a person vaccinated with the nasal-spray flu vaccine is low (0.6%-2.4%). Because the viruses are weakened, infection is unlikely to result in influenza illness symptoms since the vaccine viruses have not been shown to mutate into typical or naturally occurring influenza viruses."
Maybe Ronnie or CG can help me out on this?
Needless to say, I've gotten the regular flu shot and will be getting the H1N1 shot ASAP. But I'm just worried about everyone else putting me at a higher risk than I should be at.