This is a nice science article, but mainstream media has made this "breakthrough" into something it is not, not by a long shot.
First, it has nothing to do with vaccines. Vaccines are when you are injected with a protein that causes YOU to generate antibodies to that protein. This article is about injecting you with antibodies, which will be cleared from your body in about three days, and the authors guess that it will cost about $1000 a dose (yes, that means upwards of $2000 a week, and two or more shots at the doctor's office per week!)
Second, while the stalk of the HA protein is a great substrate for antibodies, it is not normally exposed and most antibodies won't be able to see it. Sure, they loaded up some mice with unreasonably high amounts of antibodies and saw some protection to select strains of influenza, but there is a long way to see if this will work against many (never all) strains of influenza, or even if it will work at all in humans! Again, good basic research, but its not a breakthrough, its a good start, a good idea, which is exactly what public science is all about. Sadly, they know very little about commercial drug production and are cashing in on FUD!
If you want to more about flu research go to a site like http://www.pandemicflu.gov/ . There are several new drugs, which hold much more promise and are much closer to being on the market then this!
Disclaimer: I help do research on one of those other drugs...