First thing's first: some startlingly high quality set photos of the Indiana Jones 5 Sicily shoot, taken just this week, can be found right here. The curious should be forewarned, however, that the glimpses get into spoiler-y territory.
One highlight is the first peek at the Antonio Banderas character, who is dressed as a rugged sea captain and seems to be an ally to Indy. You might think this an innocent development, but you'd be wrong:
See you on Thera!