I may have found password software that does what I want: Roboform. It's a toolbar for IE and Mozilla/Firefox that, among other things, stores passwords in a 3DES store and lets you back them up to HTML. It seems to work well, with intense AI for figuring out what forms to fill. $30.
But boy is the usability inhumane. You can get a flavour for the design æsthetic by looking at the website, or revel in the screenshots of 15 different screens. Design is a good idea, but Roboform used up all its good ideas on features.