Is there a dog influenza vaccine? Yes, there is (from Merck, called Nobivac). Approved in 2009 (see NY Times article). The dog flu can be especially dangerous for flat-faced dogs...because the dog is congested and breathing is more difficult. Frencies beware! Ask your vet if it's worth getting. It costs around 30 bucks and there are clinics.
All in all, the dog flu hasn't spread too bad...it exists mostly in animal shelters and pet hotels/kennels. Perhaps a good question to ask before you board your dog for the holidays!