They are Champs League group stage qualifiers next year, no? And rossi is there too!
I think this is a great opportunity to get some real high, high level experience. With a team like Villareal that won't have the depth of Real Madrid or Barcelona (I'm guessing), he should see the pitch. They'll have a real full slate of games with La Liga, Copa del Rey, and Ch. League.
Apparently Jozy will immediately be loaned out to another La Liga team (albeit a bad one). As long as he is playing at the top level over there I think it's a fantastic move as it gets him better competition and it gets him away from people who keep telling him he has to start for the US in 2010.