Oil may no longer be gushing into the Gulf of Mexico, but lawsuits relating to the spill have yet to dry up. Plaintiffs' lawyers are focusing their attention on determining how far the oil slick traveled, and how much damage it has done. "We are truly in uncharted waters. ... Is this oil going to end up in Europe? Will it wind up the East Coast? I think there are still many, many troubling unanswered questions," said one lawyer involved in the suits.