Channel 5 has programme on the threat that Vesuvius poses to Naples this evening at 2100. Not sure whether it has anything new, though.
I was in Naples last Monday and visited Pompeii. Astonishing place.
My understanding (and I also watched a documentary a few months/a year ago) is that the whole Bay of Naples area is a giant Caldera, and the entire area has lifted 2m in the past few years as the magma chamber builds (IIRC, it had only risen 2m in the preceding 60 years)
Oh, and I was on Sicily on Wednesday, a few days before Etna cranked the pyrotechnics back up.