As a Dolphins fan(thanks for the condolences) I usually have nothing but dislike for the Jets. It's nothing personal, just that they're in the same division as Miami and facing them twice a year brings ample opportunity to foster some hatred.
However, their signing of Brett Favre resulted in the release of Chad Pennington. That release resulted in Miami signing Pennington. It also means that he'll probably be the starting quarterback for the Dolphins when they face the Jets in the first game of the season.
And how sweet would it be to see Pennington beat wonderboy Brett Favre, and hand an opening day loss to his former team and Miami's hated division rival? Honestly, if Miami only wins one game again this season I hope it's this one.