If you encounter a page that forces you to register, just hit the BugMeNot button and you will be greeted with some nice free login details. (If there are some...)
About keyboard-shortcut: Currently extensions don't have the possibility to register for keyboard-shortcuts and I don't want to include UserJS in every page...
About auto-login: Sadly often the first credentials don't work so I don't know if I'm going to implement this. But we will see... :)