Starchild,
I have been looking at going to NAC for some time now, and have jsut started planning my 12months there. I also debated whether a hire car, taxi, bus or train would be the best option, but after a little investigating I found that Continental Airlines fly into Naples (KAPF). I only looked at a MIA-APF, and it looks like there are 4 flights a day on that route, maybe worth while checking their website out, or if you haven't booked yet, check
www.opodo.co.uk out for routes from UK to Naples (APF). I actually found a return ticket for £592 from MAN!!!
Hope this helps
ADRH