Donald, Patrick and Amir have not signed the resolution to appoint a liquidator. They have provided no reason for refusing to do so.
Bitcoinica's investors have been forced to file an action with the High Court of New Zealand. A hearing has been scheduled for Nov 1.
It is likely that this must be the first of several hearings, separated by weeks or months. Unfortunately there is little that can be done to expedite the process without cooperation from Bitcoinica's managing members.