My son started his own worm bin after reading this article and we have redworms going in a bin very similar to the one in the article. We've been adding whatever kitchen scraps we come up with. We soaked the soil and newspaper bedding initially and haven't had to do it again as it stays pretty moist on its own. The bin is starting to attract small flies and some of the scraps are molding. There doesn't seem to be a lot of worms when I pitchfork some soil up. Only one here and there. We just started this a couple weeks ago though so it might just need to get going.
Omaha,
Not to worry. Each adult worm will lay about one cocoon a week, and each cocoon will hatch into several tiny worms in about three weeks. The cocoons look like tiny grapes, they are the color of a mustard seed, the size of a peppercorn. The newborn worms look like tiny white threads. It take these tiny worms about 10 weeks to become sexually mature -- but they still won't be real big.
I've started new bins as late as May, and by August I've got an adequate supply of worms. By October I'm loaded with worms. If you don't let the chickens into the bin, they will keep going for years.
Turning the material in the bin should help with the undesired critters.
Good luck,
Ken