I got the email too, and linked the Ugly Mugs site to my facebook account (I don't do Twitter, but it can work just as well), as all my friends are aware of what I do so wasn't worried about putting it up there. I put up a little post explaining the situation and hopefully they might give and also share.
I'm aware that not everyone will be able to do this as their facebook accounts will have people on their profiles that don't know what they do, but for those who have friends or family that are aware, I thought it might be a good way to help spread the word.