So I finally got AmEx to send me a cardreader for my creditcard. The tool, under windows... is cute. Because it doesn't meld well with mozilla, I won't be using many of its "auto-form" features. But what it does do for me is let me store data on the chip on the card. Web passwords, as well as various sensitive numbers, et al. I feel ok putting such information on The Card -- if compromised, it is bad regardless. And I believe their security is decent, anyway -- smart cards are a pretty hot target.
So it delays my acquisition of a PDA by yet another unit of time. Between my cellphone, the card, and a scrap of paper filled with addresses, I should be good for a while. I could always get a cellphone that lets me store addresses.