https://etherscan.io/accounts displys The Dark DAO - 3,641,694 eth stolen from TheDAO as 3rd place. (As of time of the post).
Congrats to hacker ;)
Not yet stolen part of TheDAO is 7,913,004 eth
So 7.91/(7,91+3,64)=0.685 is kinda "fair price" for 100 DAO tokens.
https://poloniex.com/exchange
shows 0.61 per 100 DAO.
Certainly this will be wrong numbers if more ETH are stolen.
But now that bright crypto minds are all together keeping things secure so I don't beleive something would happen before softfork/hardfork.
If softfork occurs, hacker will get only bounty 1% or like if he returns ETHs back
if hardfork occurs, hacker will get nothing
if neither soft nor hard fork occur, the price will be stable at "fair price" of 0.006 per DAO.
So go long here. Need to hedge ETH/USD risk though.