Unless it's a loan move a la Abbiati when they injured Buffon in the Berlusconi trophy, and he wants to go there to get some playing time before Euro 2012. With Cassano being out for a substantial period of time, Pato constantly injured, Inzaghi being old, and both Ganz and El Shaarawy being inexperienced, not to mention Robinho's inconsistency, they could use someone like Quag for a few months, and he is also eligible for the CL.
I'd hate to lose him, especially to a direct rival, but if he goes there and regains his form, does well, and comes back to us in even better shape, then there are positives to this deal. He may raise his value, and if Conte still doesn't want or need him, we can exchange him for Jo-jo or someone else.