The BBC reports that a drugs company has developed a vaccine against influenza A. That's all influenza A, not just this year's variant. Not a perfect vaccine, but protecting 90% is better than 0%.
In the Acambis press release here, they state that a pre-clinical study suggests that the vaccine provides 70% protection against the Vietnam 2004 strain of H5N1 avian influenza. Which is some 70% better than the control group.
Of course, even if it works it will be some years before this is readily available.