Fantastic to see these companies doing this.  I checked them all out.  It looks like www.usedcardboardboxes.com is an actual web store where you can buy boxes and they deliver (free) to your house.  The others are either local and/or you have to drive around town.  A friend told me about used cardboard boxes and she said she ordered a kit online and they were delivered to her door, next day, for free.  I didn't believe it, but I checked just now and its true.  All of their shipping is free.  I'm not sure how they do it, but with a satisfaction guaranty, what do we have to lose? 

Regardless, I think its great that all these companies are doing what just plain makes sense.  Selling a product that already exists, and not cutting down trees to make new boxes.

Great job.  Great post.  Let's keep it up!   Now, who's got a good moving company?