Yes the attacker is on the move again right now. He donated some ether into the DAO and joined both whitehat splits. We drained the ETH he donated as fast as we could but he got what he wanted.
An attacker in now part of split 78 and he can now do the split attack again in that white hat DAOs.
Analogous to the unbounded recursion of Turing-complete scripting, the splitting can be recursed. Are we surprised.