That's actually pretty interesting...I would have thought that by the time Apple had enough cash that they would have bought ALL those names...Polynesian floral and err...stuff? Well I guess they missed out!
You can buy any domain you want, but the problem is whether or not Apple thinks you are infringing upon their trademark or trying to profit from it. Depending upon the kind of website, you will probably be fine (Mac is trademark too I'm sure, but they certainly shouldn't have a problem with MacRumors).
Go for it. The worst that happens is puts the kibosh on it and then you can let the news outlets know that they squashed the little person with the nice little website.