Don't forget to pack some shoes suitable for walking/hiking along the cliffs between the towns on the Cinque Terre.
Photo Equipment: A camera is a must. The coastline is spectacular. Digital is best - that way there is no limit to the number of photos you take!!
comfortable shoes for hiking all around
Photo Equipment: a lot of memory cards for cameras
Miscellaneous: hat and cream for sun protection
pretty money, because everything is too expensive
italian dictionary would be welcome
Shoes... especially if you want to go hiking... but also if you're thinking of taking a walk along the via dell'Amore. Bring some walking shoes: I've seen countless fools trying to walk about in fancy shoes or, worse, high heels... I can assure you of one thing: they looked in pain, and they looked as if they were in trouble
Toiletries and Medical Supplies: a sun lotion can be useful.
Photo Equipment: bring plenty of films... photo opportunities abound
Camping/Beach/Outdoor Gear: a water bottle can be useful.. some villages are a bit far apart.. and there's not always a restaurant or bar in the middle where you can quench your thirst
Luggage and bags:
Keep it light: This is definitely backpack / rucksack country. There's lots of sunshine with a little wind. You'll be walking up lots of steep hills.
Clothing/Shoes/Weather Gear: Light hiking summer gear with good hiking shoes.
Maybe some swimming trunks unless you want to let it all hang out at nearby Guvano beach.
Photo Equipment: A hi-res camera or a good 35 with lots of filters and film. The cinque terre is beautiful.