I think Graves will end up with the Mets simply because they have the worst bullpen in the league and they are desperate. Also, they most likely wont have to part with Cameron, who is their biggest chip when it comes to trades right now. That's why Urbina never went to the Mets this year - they didnt want to give up Cameron.
As for that supposed trade involving preston wilson, corey patterson, and adam dunn, I seriously doubt that is real. The Reds would be giving up way to much in that deal. Their best player (Dunn) and most promising reliever (Wagner) for either Patterson or Wilson and some extra throw in? I don't think so. Dunn is a Red for life unless they cant pay him in the future.