I received the above email from Elle Tucker as I was referred to her by Alana Lowe that did the VH1 special on swinging back in 2009. I do not know her personally, however we have corresponded via email and she seems legit through IMDB and LinkedIn. I also liked that she was using an email address with a domain name, not just a Yahoo account like others I've been contacted from. I think she's legit, but producers will have their own agenda and I personally am leery of reality TV. Anyone responding to the casting call should be aware that anything you say can and will be taken out of context if it's good for ratings.
You may also want to register on the Polyamory Media Association at http://polymediaassociation.com/ . They have some great resources on talking to the media about ethical non-monogamous relationships and how to avoid traps they will lay for you.
Here are links to Elle's bios:
I've told her I will not be on the show, but I'd be happy to consult. I don't expect anything to come of that.