OK, I am afraid participating in this thread is threatening to make me a hatch-a-holic. I have four eggs under a broody hen, my first hatch ever, and hers too, (I posted a pic of her to this thread a couple days ago), and it is so exciting! Reading about all of your incubating efforts makes me want to jump in and give it a try!
On a side note, I have some concerns about whether my eggs are viable any longer. I candled (day 8), and not sure about what I saw. They are brown eggs, which makes it harder. All four have a distinct air sac, then above that about 1/3 of the egg is dark, but the darkness is all to one side. On a couple I think I could see the darker areas representing head and body, but when I rocked the eggs gently I could see some tinted fluid moving under the shell in a small (nickel-sized) circular area around the "chick". I am afraid this means the development has stopped, as I haven't read about fluid in any candling threads. I am off to do more research, but if anyone has any input it would be appreciated!