Someone sent me an email and I imported their key, but there is no way to add a note or anything so my list of keys only shows the key and an empty field for User. Once this becomes 2 or 3 such externally imported keys without user info, I am not going to be able to tell who any of the keys belong to.

It would be very useful to be able to add a note or something to a key. Any suggestions as to how you'd prefer this to work? I'm willing to work on this myself.