Screen sharing - can you prevent the attached screen from turning on? I have a machine at work that I sometimes like to connect to using screen sharing, but I don't want anyone else in the office to be able to see what I'm doing.  I also don't want to give them access to the computer - I password-lock my screen with a screen saver when I'm not at the machine, but when I log on with screen sharing, I have to disable this lock.

So, is there any way to prevent the original screens from becoming active while using screen sharing?
in Lion this is possible, but don't remember seeing this anywhere in previous versions. When you start a screen sharing session it will ask you how you want to view the remote session.