>Only one
>Taily left and that is
>Rose's husband. There are still the ones the Others captured, including the kids. When Sawyer and Kate were sent to do hard labor, the other workers were probably Tailies.
The Black Cloud must appear differently whether that person seeing it is "Good" or "Bad". Of course that would mean Locke is considered good or he is being tested still.
Juliette might have been one of the persons Ben broke with his mindgames. She now sees a way to free herself. The other possibility is that they are testing Jack to see if he is a killer or not. That would mean Ben is pretty committed to his research if he is willing to let Jack operate to prove a point. Then again, if it is the Others who are conducting the experiments, they would need to be very committed to the program to have given an arsenal to the Losties.