In a disturbingly fast amount of time (considering how long it took to end the lockout) the League and Players agreed to allow teams to use one of their compliance buyouts this season. As as of Saturday teams can put players making $3 million or more through waivers -- basically a formality -- and then will be free to buy them out after which the player can sign for another team or accept a minor league assignment. There's not much benefit for the team to do this. They'll still be dealing with the player's full cap hit all year. It's more of a way to allow the players to find an employer who wants them.
All that being said, it's not likely that Rick DiPietro would get bought out via this method. The Islanders could use a second goalie on the bench, as sitting Kevin Poulin or Anders Nilsson behind Nabokov for the year does those players no good. Also, in this special buyout period, the player has to agree to it. Rick DiPietro still wants to play and doesn't seem to mind doing it in an Islanders uniform.