I use 1Password from Agile Web Solutions. It's great -- it imported all of my passwords from Firefox and I just save new ones that way. It also does work on t

I use 1Password from Agile Web Solutions. It's great -- it imported all of my passwords from Firefox and I just save new ones that way. It also does work on the iPhone as a password filler if you use the bookmark. If you use Dropbox you can keep your password keychain in there and update it among all of your macs. It would be ideal if Windows and Opera were supported but maybe some day. For now I just go between Safari and Firefox.