It could turn out to be a good trade by both teams, as long as Tejada would be willing to move to third base. If he isn't, then it's a big waste of time on Philly's part. Under that scenario, they would end up in the same type of predicament that the Nats are in with Soriano right now. If Baltimore can't keep Tejada, then their best route would probably be to send him to the Cubs for Mark Prior.
If Tejada goes to the Phillies & is willing to move to third base, that could arguably be the best left side of an infield in the majors, certainly in the NL. The combined speed, glove, & power at the plate between Rollins & Tejada is awesome. Rollins may not have the power Tejada has, but he usually finds away to get on base & can damn sure still some bases. He also has deceptive power with the bat. We all know the talent Tejada has.