Thought I'd post my experience as well regarding this.
First off, I had dismissed the system update back whenever my machine suggested it because it was inconvenient... Once things settled down for me, I thought (as a well trained windows system user might) hmm, maybe I better do that patch before whatever internet threats I'm not protected from comes and gets me. Took a while, then I am in a cycle of rebooting (in the middle of the night no less)
So I boot it to windows and look on this site, and found that my laziness in delaying bought me the time such that there was ready information for a work around and ultimately a fix for this particular mac update.
2 things: 1 - I really appreciate the smart and sharing people supporting this capability, I got the machine back in order in short order; 2 - I will remember that I'm not following the prescribed OS/hardware in this, so even though it's a finely working system I need to look before I do any system updates next time.
I've been working with computers for a long time now(from DOS to IBM ?series to windows), my wife - just getting to touch them without getting frustrated. I got a mini for her so she could do the basic web and email thing after our son absconded her machine (with much better gaming abilities.) So far, she's happy with the OS that dell supplied on her machine.
I got another one for me to try this mac trick on. I never used a mac long enough to see if I liked it or not. When I got to play with this little netbook and get a glimpse of the underlying unix, what a fun thing this has turned out to be. And I've gotten a big appreciation for the apple technology that I would quite likely consider the platform for my next personal system choice, and quite likely my future decisions regarding business platform choices and technology have been broadened by the experience.
In my case, a $250 netbook, new hard drive, 2gb memory, a purchased mac OS license, and a whole lot of time: have been my inexpensive introduction to Apple's world. I wouldn't have picked up one of Apple's $999 entry machines for an amusing amusing test drive.
I'd hate to see if Apple decides to thwart this too much. In my case, this opens a door to further direct Apple profits.