Coders have confirmed that the developer build of OS X 10.6.2 kills support for netbook Atom processors. Nothing's final yet, of course, but given Apple's lame fight with Palm over iTunes compatibility, are hackintosh netbooks next in the firing line?
The current recommendation is to stick with 10.6.1 if you're running Snow Leopard, or 10.5.8 if your Hackintosh has Leopard. You could also try upgrading to 10.6.2 using an older or modified kernel.
If this is a conscious strike by Apple, it's likely the Hackintosh community will find a work-around, but it's definitely something to watch before your next update. [OS X Daily]