The trade would likely be a former first round pick, a young player in the 20-21 year old range that is ready to step in and make a contribution.
Having said that, they aren't going to trade Gonchar, they are going to try to make a run in the playoffs.
I very much agreed with Galley's take this afternoon. He figured that the Sens shouldn't trade anyone or even add anyone at the deadline. His rationale is that in his words, "you'll tip over the applecart in the dressing room". He figures that's why the number of deals at the deadline is dying down, organizations realize that any player change can disrupt the team chemistry that they've spent all year cultivating.
Makes sense to me, stand pat and make your best run, let the chips fall where they may.