Just read this
MacTaggart article about the Phils' offseason decisions (as an aside, I hope he gets more national assignments. He's a decent writer, and would be nice to have someone in that role who knows the Astros exist). Tags notes that Lidge is a FA, and of course the Phils will decline his option. I'm guessing with his recent injury problems he won't find a multi-year deal anywhere.
I'm grasping at straws a bit here to fill the Void... but he might not be a bad pick-up for the Stros on a one-year deal; he could set-up and mentor Melancon and ideally provide a little more stability to the back end of the 'pen. Maybe he'd only want to go to a contender, but it seemed like he liked it here, so who knows?
Melancon
Lidge
Lopez
Lyon
FeRod
Escalona
Wright
...something like that? Let me know if I'm leaving out anyone blatant; got a bit hard to keep track of the 'pen towards the end of the year there.