I love the idea of getting Zito. I'd even give up one or more of the Wood/Bailey/Pelland triumverate to get him. In fact probably the only young player I wouldn't include in a trade is EE.
Another pitcher that isn't on anyone's radar screen but who might be a solid pick up is Jarrod Washburn
. He's only 3-7, but has a 1.18 WHIP and an ERA that's inflated due to giving up 7 runs in his last start. But he's consistently going 6-7 innings this season while only giving up 2-4 runs a game. He might be had cheap as well.