I've been using Gpasman to store my numerous passwords for about 5 years now, so no wonder my first thought when I bought my Nokia N800 was to port it to Maemo. And that's what I did =)

Gpasman is now available in Maemo Garage and Maemo Downloads.
You can see a couple of screenshots here.

If you have more than two passwords and are afraid to forget them one day - give it a try, it's really handy.
I also have Gpasman RPMs for SuSE.