I confess to being totally hooked on this show!
I find it to be a really interesting concept, and, as crazy as it sounds, I imagine it could work provided that both partners are on the same page. If you were paired with someone with similar backgrounds and values, and a compatible personality, and you were both committed to staying together- couldn't you make a marriage work? And wouldn't love be very likely to follow? As long as neither one of you saw divorce as a real option- it seems like you could make it work. I've known several people in arranged marriages, and they have all been happy and committed to each other.
As for Jamie being on the bachelor, I don't necessarily see her as a reality tv show person. When you listen to her talk about her childhood and her background, it seems more like she really wants a family than anything else. And, if she was just about being on tv, I don't think she would have had the breakdown at the altar because her plan would just be to get the divorce at the end of the show so it wouldn't have been that much of an emotional deal. But, I hope she really does give it a chance since it seems like his personality and his close family would be a good fit for what she has said she wants.
I think all three couples are pretty cute- I'm interested to see what happens!