New Apple Air notebook vaporized in PWN2OWN contest
At the CanSec West conference, at end of March this year, Charlie Miller wins the PWN 2 OWN contest. He was able to hack Apple Air notebook within 2 minutes. I think he was most likely sitting on a vulnerability waiting until the contest.
In other news some swiss guys did a pretty good analysis of the time it takes for Apple and Microsoft to patch there disclosed vulnerabilities. Apple sadly has a ways to go.