"For all the talk ... the DOL never really defined exactly what 'best interest' means. Indeed, according to the formal release, there is an expectation the term will be defined through class action law suits, which the DOL explicitly encourages. This offers little in the way of help to both 401k plan sponsors as well as the financial service providers that serve them. Are 'best interests' in the eye of the beholder, or is there a standard definition to this new standard?"