I think it will be helpful if the Database Open dialog box allows Replica ID also. That way we don't have to type the notes url on the notes client address bar to open the db.
Some server may have also multiple replicas on the same server (for RAM performance, backups, etc...), so a simple REPLID would only cause confusion and incoherence.
@2: It wouldn't cause confusion and incoherence if it threw a reasonable error dialog like: "Multiple databases match that replica id. Please select from the following choices.
Still, I don't think this is all that useful a feature.