Sounds like a classic transfer case of a player who is in the process of being signed somewhere and has been told by his new club to keep quiet about it until they announce it formally. In the mean time someone has blabbed, so now the player and his family are in "don't know whats happening mode" trying to shut it down until something is officially announced.
Its possible its OM but I would be very very surprised if it is. OM are a big club who regularly play CL football. They normally scout and recruit heavily from Africa. Its hard to imagine they would sign a kiwi kid on the strength of one and a half U21 WC games. Still...good luck to Bill where ever he is going!!!!!
If Tuiloma has NOT signed somewhere then he would be trialing at the Nix.