Yeah, i just read this article. It does seem as if the hacking world will try at taking hits at OS X, but i don't think that it will be as easy as what the article makes it out to be. Unix is known for being one of the best OS's for security, like stated in the article, this is why thousands of Servers for networking the internet use Unix.
However, i am not saying it can't happen, i just think it will be difficult, let alone ridiculous because of Apple's small [6.3% i think] market share.