Each month, National Geographic highlights a ZIP CODE from somewhere throughout the USA and includes a couple pages of discussion about the ZIP in a section called ZipUSA.
As seen in the thread above, the April issue happens to highlight a town in Maine. I think the fact the "Bloodworm" is an integral part of the discussion makes it a very interesting article for board readers.
Red Cherokee's link provides all the text you need for the article. I thought that some of you that don't subscribe to the magazine will like to look at the photos that were included in the article.
BTW, I found it interesting that the worm diggers get paid 12¢ a worm. How much do you pay for a dozen worms? I'm interested in the retail mark-up.