I’d wait for the OS to at least be released as beta before I’d expect to see much in the way of program support.
but i think Melih has said cis v6 will support windows 8, dont expect support before that.
Or we might be lucky and 5.9 might run in the W8 beta. Something similar happened with the W7 beta and the then current CIS. However, CIS does not run on the W8 developer preview… :-\