I can't wait either! According to the workout blender information page, it will be available at 2:00 p.m. EST. I'm already creating pre-mixes in my head. You can bet that I will be logging into the computer at 2:00 p.m. tomorrow.
We were planning on releasing today, but found a critical bug over the weekend. Our developers are working on this now and hopefully will have this fixed by tomorrow.