As far as keeping things on a memory stick–keep it there AND on the computer. I have a paper address book and a printout of everybody’s email addresses kept separately, because I’m paranoid, but also because I once lost my email account for a week and panicked (that was when I started printing out updated lists of email addresses). I keep old address-update emails in case I lose the paper copy… you get the drift.

I have a moleskine, too. I’m highly susceptible to that stuff.

I use a PalmPilot, myself – I’ve had it for years.

And I can see one theoretical problem: referring to an on-line address file by going on-line is more prodigal of carbon than using paper; computer power costs to you, added advertising costs to the people supporting the freeware, etc. If you’re the sort (as I am too) who keeps old diaries, there are plenty of the big producers who turn out Green Diaries on recycled paper. (Letts certainly do – I have one going back to 1992, and would buy them every year if exploitative retailers didn’t insist on charging twice as much as for ordinary paper – but people must buy them all the same, in the same way as one drives a Prius, which leaves a carbon footprint equal to a Hummer, to make a statement.) Green pens (the chemistry, not the carbon content, of the ink) are easy to find today. And the Moleskine is by far not the best diary on the market, even if it’s trendy – there must even be local producers in TO, so that you save on emissions by not having your diary flown in from Italy.