The Google blog also announced they teamed up with U.S. Department for Health and Human Services (HHS) to provide a Google Maps mashup to help people find flu shots in their area.
One person asked in a Google Maps Help thread, how does he get his facility on the Google Maps list? I believe the way to do this is to go to Flu.gov, find your state and then navigate to the government office that is handling the list. Then submit your facility to that government office.
Anyway, here are the local places in Las Vegas that have flu shots:
Forum discussion at Google Maps Help.