Miss Universe Update

Actually, in the case of "Jenna Talackova" , there is no update. According to "Missosology" this picture of "Jenna" has been taken down.
Reportively, the last known transsexual contestant in the "Miss Universe" pageant was back in 1994 because:

Jenna official portrait at Miss Universe Canada website.

"Many national pageants lack specifics in their requirements. In many countries, it is legal to change ones sex. That is why in 2004, Chen Lili, a transsexual, decided to join the Miss Universe China pageant. "A sex-change woman registering for the Miss Universe contest is something that has never happened before," Miss Universe selection committee chairman Zhang Ruiling told reporters. Chen Lili's application was denied. The public opinion was divided.
Cao Gang, a beauty contest expert in Shanghai, offered his support to Lili: "She has been granted the status as a woman, and is protected and recognized by law. There is no reason to kick her out." But some see it as a publicity gimmick. "Another media circus."

Chen Lili is the first transsexual who attempted to join the national qualifiers of Miss Universe

Being a bit of a bitch, I can see why the other contestants wouldn't want these women in the pageant for more reasons than being transsexual!