The Macbook air went down quick in only 2 minutes on the first day of the competition. Windows Vista SP1 went down on the last day after 2 days of intense work. The only OS left standing (drum role please) LINUX. Reportedly, participants reportedly were not prepared to deal with the SP1 version of Vista or it may have gone down faster. The exact exploit to Vista was not publicly divulged. Linux on the other hand was the only OS that was left intact. At the end of the competition is was reported that many had found the holes in Linux OS but did not want to take the extraordinary amount of time to write the code to exploit the hole. Lesson one from a Windows hater, Linux is better and more difficult to exploit.
Linux unscathed at the PWN 2 OWN contest