I served as a councilor to Ensign Wolfgramm, Iohanni's nephew, throughout the 80's and early 90's. As a result of my relationship with Ensign, my wife and I had the wonderful opportunity to receive a blessing from Iohani.
I knew that Iohani had raised at least 2 people from the dead. One was his daughter, and Elder Oakes speaks of the event in one of his talks. (Also in the June 2001 Ensign
http://lds.org/Static%20Files/PDF/Magazines/Ensign/2001/Jun2001Ensign.pdf Pages 13-14) I had the opportunity to talk to this daughter of Iohani and she told me about her experience of being run over by a car, having her head crushed, dieing, receiving a blessing from her father and coming back to life without any physical evidence that her head was crushed.
Another story I was told was that a relative of Iohani was in the LDS hospital and had died, It took over 2 days to get Iohanni to come and give him a blessing, as he was in California when his relative died. The staff at the LDS Hospital told the family of the dead man that they could not keep the dead body any longer in the hospital room and they were about to move him to the morgue. Finally Iohani got there and revived the dead relative.
The reason that Iohani had the gifts that he had is that he was so very humble and a true follower. He went on eight full time missions to Tonga. He told me that he visited the huts or doors of every person in Tonga, even the King and Queen. Tonga is now predominately Mormon, and some of that success is due to the efforts of the Lord working through Iohani.
My wife and I each received blessings from Iohani, my wife was told in her blessing that she would see the Savior and that she would witness the return of the city of Enoch. Mine was equally wonderful.
Iohani Wolfgramm did not mention to us the coming economic collapse when we met with him, but he did mention getting our lives ready for the Savior's return as he told us that His return would happen very soon.
Iohani's words have sunk deep into my heart. It was a great blessing.
Darren