I don't believe PCLinuxOS has ever released an RC ISO. There is no deadline or roadmap, either. It's finished when it's finished. That's always been the PCLinuxOS motto. We like it that way. Instead of buggy releases, we get solid releases. With that said, I believe the developers have been on a holiday rest, and then they've been hard at it, since. The goal is to get the 64 bit up an going, then finally get to some major releases that's we're behind on, such as KDE. I imagine the developers will end up skipping KDE 4.7, since 4.8 is almost ready to be released. Getting something like a 64 bit release ISO out is much more work than the 32 bit, since every package in the repository probably needs recompiled for 64 bit, and that take a whole lot of time.