ZeeTamil network carried an amazing story of how a mystical and mysterious Suvadi or Nadi, Agathiyar's Jeeva Nadha Brahma Suvadi came to be delivered to Sri Muthukumara Swamigal.
I translated the episode, and posted it at http://agathiyarvanam.blogspot.com/2014/08/nambinal-nambungal-episode-23-july-30.html earlier.
"It is said that the Suvadi 'speaks' with its owner. This rare Jeeva Suvadi is not available easily to many, one has to go through much 'tests' by Siddhas and obstacles to possess one. Sri Muthukumara Swami of Courtallam is in possession of this Jeeva Nadha Brahma Suvadi. He was gifted with the Suvadi in 1997. The Suvadi is said to answer doubts of the people."
Vendhar Tv too has also carried a coverage of Sri Muthukumara Swamigal and the Jeeva Nadha Brahma Suvadi.
Read about Srimathi Vijayalakshmi Ravichandran's experience with Agathiyar, Sri Muthukumara Swamigal and the Jeeva Nadha Brahma Suvadi at http://agathiyarvanam.blogspot.com/2014/12/muthukumara-swamigal-jeeva-nadha-brahma.html
Muthukumara Swamigal can be contacted at 94 4385 1965