Contest link: http://www.theregister.com/2007/04/20/pwn-2-own_winner/
30 minute hack: http://www.zdnet.com.au/news/security/soa/Mac-OS-X-hacked-under-30-minutes/0,130061744,139241748,00.htm
Future problems: http://www.zdnet.com.au/news/security/soa/Ancient-flaws-leave-OS-X-vulnerable-/0,130061744,139234678,00.htm
The last two links are stories related to gaining access to and running with root control. Just google Mac vulnerabilities or something like that, there's plenty more.
And yea, the Mac running Windows is better than Windows running Mac, that's for sure.