Well, by the looks of the exhaust mani gasket (old looking?) It may just need to be replaced, or try tightening all the bolts again if you haven't already? Or, maybe you could try the VC gasket, although from the small area shown in the pic it doesn't look like it's leaking. This may be a real wild guess but I suppose it could be possible the oil feed line to the turbo could have a small leak and be spraying oil up in the general area??
Just some thoughts /ubbthreads/images/graemlins/crazy.gif