You are giving up a great pitcher, Glavine, for a great pitcher, Oswalt. Advantage slightly to Glavine.
L Hernandez, a starting pitcher who's had a great start, for Julio, a closer pitching great on a mediocre team,
Jaque Jones, who's had a great start but has been average lately, for J. Damon, who's having a great season.
It will come down to what his starting pitching needs are, but man for man, I wouldn't make this trade because of my doubts about Livian Hernandez, and Damon's worth over Jones.
But I hope he accepts so your team will be better!