Matan1: I read an article which stated that R’ Teitz from Elizabeth won’t be mesader kiddushin without a pre-nup. Not only that, it said that he actually makes an announcement about it at the wedding, before the badekin. He has them sign it at the wedding. He says it’s to show people he is in favor of it, and to encourage others to do it.
Disclaimer: I’ve never seen it in person. I also asked a friend of mine who lives in Elizabeth about it, and he laughed at me – he said R’ Teitz doesn’t like to be mesader kiddushin. His “thing” is to read the kesubah. (I’m sure that he has been the mesader kiddushin when asked, though!)