That's quite an essay!
Anyway, let's see... 5th place at this point doesn't sound too bad. How many teams in the league?
The deal you made, with the Mantei pick-up is excellent. Consider using Uribe and Mora in a platoon, using Uribe at home.
Don't drop Mantei. Apparently, he's doing better than could be expected so far. I think Kim will remain the closer, but if Mantei's only taking up a DL slot, it's more than worth keeping him there as insurance.
I'm not quite sure yet about Lilly. He's a decent gamble, but I think he'll have some rough outings in the foreseeable future.
The Mussina deal looks a bit risky to me. If Mulder returns, you'll be fine, but there's been talk of the A's rushing him back. I'd wait another week before offering this, but in general I think it's the right sort of trade to go for.
I agree with Tim that Beckett for Ordonez is a tad optimistic, but I don't think it's insane. Beckett has as much potential as anyone in the league (even though he's a ways from reaching it), and Ordonez' value is lower in mixed leagues. The NL is deep in of. Try adding a lesser of to the offer, and also ask for a lesser sp in return, if the offer is rejected.
I'm not entirely sold on Moyer. Of course, I underestimated him last year, so you may not want to trust my judgment here, but I feel last year was a career year which he won't come close to repeating. If there's any way to do so, I'd use him primarily at home.
My prime choice to shop would be Colon: enough name value to hopefully get a good return, but erratic enough that you wouldn't miss him much.