I'm in favor of trading Brad Lidge if we can get something of real value to fill a hole in the team, but it has nothing to do with the shaky start this spring. I just think teams tend to over value closers, and they tend to break down and/or turn to crap more than other positions.
I'd have definately done the Miggy Tejada trade as a for example. I don't think I'd trade him straight up for more than a half dozen closers though, probably less than that.
Of course you have to give up something to get something of value and lidge is the first place I'd start on this team, but it'd have to be big type value.