Centec Solutions is an interesting website because of how it is used by its owners. It is an online catalog that gives them the capability to print any portion of that catalog or deliver as a multi-page PDF document, tailored specifically to individual clients. That is very flexible. They also create their own new pages in minutes. That is also pennies on the dollar compared to printing a 24 or 32 or 48 page catalog with 140+ products.
Centec owners came to us for some traditional catalog design and we had a different solution. We could have certainly designed and printed a catalog, but they really only wanted a relatively small number with a growing number of parts in the future. We suggested building their catalog within the CMS website and focusing on the printer-friendly aspect of the pages where would create a stylized look that would be a worthy substitute to the traditional printed book. 
So it's "green" friendly twice-- Less $$$ and less paper. That's a win/win/win situation.  (client/environment/us) ;-)