I'm considering using lastpass.com for generating and storing all my passwords for various web sites, so I can login from my computer, phone, or some remote computer.
Lastpass. It has the ability to do secure notes in the browsers, so no more fumbling for my wallet when I need to order something. It works for all browsers, including mobile, and it is easy to back up.
Also, the just bought XMarks, and will be rolling that in. I see it becoming something of an information storing and syncing suite.
I use 1Password. It has versions for Mac, Windows and iPhone, with extensions for all the browsers I use. For the rest they offer an HTML version of your keychain that works almost like the native app, so it is very convenient.
The only thing that is missing is a sync service (they used to have one but they chickened out). The keychain file can be shared on DropBox or something, so that kind of solves that problem, but it is not ideal :)
I haven't tried many alternatives, but so far I am happy with this solution :)
I use Keepassx - the Linux sibling of Keepass. It is not as well developed but what makes it a workable are the field variables so you can more or less template teh whole setup.
Noticed that LastPass is featured in the newly released Opera 11, as an example of an extension that can be installed. That's a pretty powerful vote as well!
Also, the just bought XMarks, and will be rolling that in. I see it becoming something of an information storing and syncing suite.