Now theres option to have 1 url, 1 username and 1 password - the way of thinking is just for basic websites.
I would love to use Keys also for servers etc, there you would have 1 address, multiple usernames and multiple passwords. Example could be linux server, there could be ip or name of the server, then a basic username/password and root/password, possibly database credentials etc. The same would work for websites with multiple levels of security, sometimes some boards have special admin-pass what you need when you login to admin-cp.
The way to do this is let user modify and add colums of the Keys.
Also it would be great to add own icons for entrys, now theres just few basic pics where to choose.