I think its pretty clear at this point there are stolen bitcoins being laundered here.
How many are being laundered is speculative.

I also think its safe to say that if we have large amounts of funds coming from mtgox accounts which no one has been able to withdraw from in months, these are stolen bitcoins. In my opinion these investments should be disqualified unless the "investors" are willing to come forward and make a statement regarding the legitimacy of these bitcoins. If they were purchased (somehow) then they should have no trouble backing that up.

I also think it might be wise to freeze these investments, that is, do not hand over the corresponding amount of Safecoins until the matter is discussed.