Scully won't be able to come to us via free agency. The player needs to have been at their previous club for 8 years. The 2004 draftees (Deledio's draft) will be the youngest ones that can be affected by this rule when it comes into effect (end of 2012).
Actually it's 6 years when they become a restricted free agent, which means if their club can't match our offer then the come to us
It's after 8 years that there is unrestricted free agency where a player can just go to its club of choice. The thing in the original clubs favour is that only 2 more years later they will become eligible to be a veteran, which is has salary cap benefits to pay them more.