Me:

Handspring Visor Deluxe, for addresses and phone numbers, ebooks (currently Lawrence Block's "Enough Rope"), appointments, shopping list, checkbook register, journal. It has a modem module, so I can hook it up to a phone line and get my email if I need to. If I'm actually traveling, I take a Targas Stowaway fold-up keyboard, but I don't bother to carry it around every day.

Motorola StarTac. I guess it's old technology now, but I remember when it was like science fiction. I like that it closes into a little compact package that I can put in my pocket and not worry about pushing buttons (or turning it off) accidentally.

Keys, with a mini Swiss Army Knife and a little LED flashlight attached. No watch--I got out of the habit except, again, when I'm traveling--but with the cell phone and PDA, I can always find out what time it is.

My knitting--not gadgety, I guess, but I almost always have it with me in case I get stuck waiting somewhere. Currently knitting: a pair of purple stripey socks.