Ok, so my wife has hopped on board, and got serious with her fitness.
She told me she was bored with her workouts, so I took time to write some creative circuits for her to get her excited an keep her motivated. I took her through the first circuit yesterday, and it went exceptionally well.
I used bodyweight exercises, TRX, Jumprope, Perfect Pushups, and Exercise Balls to accomplish cardio, strenth, and metabolic conditioning, and flexibility.
She loved it! 
So after the workout, I had her set a goal for herself. She set a goal to lose 75 lbs in 1 year. Very reasonable, so I think she will have no problem accomplishing the goal if she sticks to it.
I started a new category on my blog for her to track her progress as well. And wrote a post to start it off, if you're interested, it's at:
http://blog.gettingfitnaturally.com/?p=369
Thanks,
Justin