Just because all of the NFL's marquee free agents have signed with their respective teams does not mean all transactional activity will cease.
In fact, quite the opposite will happen.
Teams will begin trimming the fat off of their rosters as they attempt to secure the best 53-man roster possible. During that process, some notable veterans will be cut, primarily for cap reasons.
The Dolphins have a handful of overpaid veterans who might be on their way out of Miami sooner rather than later. We can only hope that the Dolphins sense up, cut these few, and free up some cap space to help fill out the roster (swing a trade for Dennis Dixon maybe?).