I am aware of the renewed interest in the Canberra Times' (Brzakovic's local regional newspaper) story that arose when Ratzinger visited Australia in 2008, which elicited some interest from a few regional European newspapers. The story still all hinges on the claimed conversation reported only by the lady, without any independent verification, and with the relationship changing from ‘first cousin’ to ‘second cousin’, an even more tenuous connection. The story was never verified by the Vatican or by Ratzinger.
(It is amusing, though, watching people 'finding' these other sources that I already found on my initial verification.)