Sorry for the slight delay on this issue - we were out of town visiting family and couldn't face putting out the issue late at night after dining in the airplane's sumptuous surroundings and enjoying the scintillating entertainment. And if you believe that... [ACE]
Set Password Activation Time in Snow Leopard
In Snow Leopard, you can now set an amount of time after your Mac goes to sleep or engages the screen saver before it requires a password to log back on. In Leopard, the option was simply to require the password or not. Choose among several increments, between 5 seconds and 4 hours, from System Preferences > Security.