It is happening slowly but surely... It is getting easier to find out which vendor is greenest. May people don't know the phrase "Greenwashing." It is the practice of simply using green in marketing materials but not following through with any real commitment to the green movement.
Welcome ClimateCounts.org. On this site they are begining to rank all kinds of businesses, from airlines to housecleaners, based on how well they really do in being green.
And for companies that want a roadmap in going from where they are now to becoming green, they have guidlelines to follow. Check it out.