Hacking the F-35? It's Jointly Built!

There's an interesting story in the Washington Post this morning, following up on a story that the Wall Street Journal broke, that some hackers from another country (with various side references to China later on) had broken into the Pentagon/Lockheed computer systems for the F-35 Joint Strike Fighter.
[The F-35 is the new fighter plane that Secretary Gates wants to produce to take the place of the F-22, which he wants to phase out. Part of the rationale for the F-35 is that each new plane is cheaper than each new F-22, which is true--each new F-35 "only" costs about $100 million, not even a third of each new F-22 (about $339M). The problem is--and maybe this is why the Pentagon has such problems with cost overruns in its budgets--apparently no one has noticed that only about 60 more F-22s were going to be built.
So even if they are individually more costly, the remaining cost would only be about 1/10 as expensive as the more than 2,400 F-35s that the Pentagon has requested!
The total costs for the entire F-35 program could add up to close to a trillion dollars, more than President Obama's recent stimulus package.]
To get back to the hacking story, various officials immediately reassured us that no critical information was lost. Aside from the unlikeliness that these officials actually know what was lost, the whole thing gives me the sense of a vast misdirection ploy. After all, aren't we building the F-35 jointly with 8 other nations in the first place?
And do we really think that the other 8 nations--including the United Kingdom, Norway, Italy, Denmark, the Netherlands, Turkey, Australia & Canada--are all going to protect U.S. military secrets as compulsively as we do (except for Israel, of course, which apparently has the right to spy on us without serious penalties--see developing Jane Harman scandal for further details)?
http://www.washingtonpost.com/wp-dyn/content/article/2009/04/21/AR2009042103938.html?nav=hcmodule