anyone grow nightcrawlers??

I know that they're used for feeders for a number of herps, and I was wondering if anyone has ever grown their own? I ran across this website: http://www.nyworms.com/ecare.htm

It got me thinking it might be neat to grow my own.. mostly for fishing but who knows with an endless supply of nightcrawlers I might pick up something that can feed on them!

I was wondering if anyone had any input on raising your own nightcrawlers, or any experience with it.

and as long as I'm thinking about it.. what do people feed nightcrawlers to? I know that various frogs are sometimes fed them, though never exclusively as it seems that they are just part of a varied diet.

Garter snakes

i plan to make a small breeding group when i get my pirahnas, and maybe some fishing bait. thank you for the "how to" sheet!