For the background, would it be feasible to have a large key-colored green backdrop? Then just tweak it in photoshop real quick instead of having to carefully select + PS the stands out. Just thinking out loud.
Looks like we are a go. After the cutout is done and depending on the speed of your computer, it's about a 10-15 job, of which most of that time is spent on evaluating the look you want to achieve.
I'm in Baltimore this weekend shooting some gymnastics. I'll start putting together the tutorial next week in this thread. Thanks all. Stay tuned