TYPO3.Flow

What i'd really love is something like this to easily offer some
[ ] keep me logged in
login form functionality

TYPO3:
  Flow:
    session:
      # this is the default - doesn't break backwards compatibility
      inactivityTimeout: foo
      scenarios:
        myScenario1: # the user wants to be remembered
          # set timeout to one year
          inactivityTimeout: 31536000
        myScenario2: # the user logged in from an internet café
          # set timeout to 30 minutes
          inactivityTimeout: 1800

and in the controller

public function authenticateAction() {
    ...
    if ($keepMeLoggedIn) {
        $someObjectWhereYouWouldSetThis->setScenario('myScenario1');
    }
    ...
}

If the scenarios would then inherit from the default, you have everything you need to build your own configuration sets.