This one falls under the "No move is too minor" category.
The Phillies have acquired Ronny Paulino in exchange for catching prospect Jason Jaramillo. This really doesn't mean anything except that the Phillies were ready to move on from Jaramillo, who at one point was their top catching prospect. With the emergence of Lou Marson, Jaramillo appeared to have been pushed to the back-burner. Marson, after all, was called up in September. Jaramillo wasn't. In exchange, the Phillies receive a catcher who has played in the majors. In fact, Paulino hit .263 with 11 home runs in 457 at-bats in 2007.
Nothing new at this point as far as Mark DeRosa goes. I'll say this, though: use some common sense before reacting to some of the rumors that are out there. Example: the Steve Phillips rumor that had J.A. Happ and Jason Donald being shipped to the Cubs in return for DeRosa.