Eh, they aren't closed. They have to remove any stuff that was deemed to be a violation, which wasn't all that much anyway.
However, this is obviously Apple's response to 10.4.4 being hacked because they didn't expect it. However, the person who does the hacking isn't affiliated with the OSX86 site, or any site for a matter of fact.
Apple also sent a C & D to another OS X x86 site so it's quite obvious they're not too happy.