Have you been keeping up with my packages? I'm currently in the process of rebuilding a huge number of the packages. I went through and found lots of things that needed to be updated. I'm now recompiling a ton of the packages to be built against the newer libraries and programs. I didn't know I was going to do this until after RC1. RC2 will have all of the updated programs, libraries. I would wait before adding anything to the repo as in most likelihood you'll end up replacing most of them anyway.
Umm...I see the mjpegtools rc3 in my contrib. Not sure why you can't see it. Oh, wait...Somehow it ended up under Programs. It's moved now. But, like I said, you'll probably have to replace it in the repo anyway as I am making some modifications to it as I speak. Get ready for a large package move soon!