We announced today that we're pulling the WSS 3.0 bits out of Windows Server 2008 RC1 onward.  No real change here, it will still be available free as a download and no change to the licensing but WSS won't be on the Server media any more.  Not exactly sure why we've done this but I think it may have to do with decoupling WSS development from Windows Server product cycle.  Having it as a download gives WSS more flexibility to upgrade it more often and do patching I suppose.  In any case, it's good that we are letting everyone know in advance.