Okay, that kicks ass. You got my email address; I can't wait to use the product.
1. You got on my good side when I saw young Arnie. That's awesome. I hope if you need permission you get it, because it would be a shame to lose him. I got an instant flashback to "Pumping Iron" and how charismatic and inspiring he is in that movie (despite being a dick.)
2. I got briefly annoyed at the initial screenshot. It's obviously a screenshot, but it contains instructions to close the locker door, and I just could not stop myself from spending thirty seconds trying to close the locker door even though I knew it wouldn't work. It's hard to explain, but I just had to try to close the locker door before I could move on. I bet some people will be legitimately confused, too. Screenshots are okay as long as they don't contain instructions telling you to interact with them!
3. Clicking through, looks cool, looks cool, being sold, and then BAM I'm completely sold on the screenshot that shows I can earn stuff for my friends and vice-versa. For many people it's a lot harder to let other people down than it is to let themselves down. I immediately thought of a certain friend who's a rather extreme case, but it applies to me, too. My first breakthrough in fitness, when I went from a wannabe exerciser to a guy who actually does work out a few times a week, was when I had a roommate who recruited me as her running partner. Social pressure, not wanting to send my friend out running alone when she was asking for my support, pulled me through a lot of tough times when I really, really didn't want to work out, and then when I moved out a year later I found I was, for the first time in my life, capable of pushing through those tough times by myself. I bet your product will accomplish the same thing for a lot of people -- you MUST do this!