The Phils definitely re-signed Lidle to shore up a spot in the rotation. I think it's general consensus that to start the season, the rotation will be: Leiber, Padilla, Wolf, Lidle, Myers. Myers' mental struggles are well documented, and both Padilla and Wolf are coming off injuries, so there is a decent chance that a replacement starter will be needed somewhere along the line.
If I had to venture a guess, I would say that Floyd gets the nod over Madson. Keep in mind, part of the reason the Phils were confident in sending F Rodriguez to the Yanks for K Lofton was Madson's effectiveness in the bullpen. Floyd was up in Sept and looked damn good, so it's not like he's a 100% unknown at the big league level.