Rear main & front main seals, intermediate shaft & camshaft seals, t-belt, water pump, valve cover gasket if it's weeping at all. Wouldn't hurt to do exhaust & intake gaskets now, either - much less back ache out of the car than in. Turbo - this would be the ideal time to replace the return pipe o-ring at the block if there's any sign of leakage. And do yourself a favor & clean the oil separator while you can get to it. Just be careful not to break it or lose the plastic return pipe that runs down into the block from it. Do you need to do the oilpan gasket? They're normally very good but if it's leaking DO IT NOW! Really beastly job to do in the car... No doubt I've missed something, others will add to this list I'm sure.
-Chris