Tihan represented Wendon, the limited partner of Bitcoinica LP.  Limited partners can only participate in "safe harbour" management activities without exposing themselves to legal liability.  Tihan seems to have been extremely careful to avoid doing anything which would potentially expose Wendon to liability.

The liquidator's last report suggests that he's had contact with the limited partner.  It's not in Wendon's interests to involve itself in the liquidation beyond co-operating with the liquidator.  This has been one of the problems throughout this whole clusterfuck - Wendon has always wanted others to take the actions which bring with them legal liability.

Given that Tihan is an investor in CoinLab and CoinLab has initiated litigation against MtGox, I'd expect Tihan to let the lawyers handle any communication with MtGox at this point in time.

The partners in Bitcoinica LP and Bitcoinica Consultancy (also in liquidation now) don't really have a role to play in the liquidation beyond assisting the liquidator.  They no longer have any authority in respect of Bitcoinica.

This is all just the nature of getting into bed with venture capital.  "Angel" investors play hardball when things go sour.

Ironically, I'm somewhat more intrigued by the Rackspace hack than I am by the Bitcoinica intrusion (hell, I even have questions about the Linode hack and whether other services were targeted solely to deflect attention).  The database was ever so conveniently destroyed during the Rackspace hack and I'll always wonder what secrets it might have revealed.

I understand Tihan's position from a purely business perspective.  I still believe that his trust in Zhou was a fatal error of judgement.