jcoffman,
There is a great article in October issue of Inc. magazine,"The Coolest Little Start-Up in America." The company is called TerraCycle and they make plant food from worm poop and package it in reused bottles. Slightly different business model than what you will be doing but he got their product into Home Depot and Wal-Mart and would be a great resource if you can get in touch with Tom Szaky, the founder and CEO or someone else from the company.
Go to inc.com and type or (cut n paste) The Coolest Little Start-Up in America, in the search.



