Hi trapezius.
Just wanted to say that I too saw that article and I too don't really know if it is legal for me to have my chickens but I got them anyway. I tried to look up the ordinance for my county (Calvert) and didn't get very far. I finally decided that if it is that hard for me to figure out, and if I plan on being a responsible pet owner, than I should just go for it and "ask for forgivness and not for permission." I think one set of neighbors already think we're odd due to the number of cats and dogs we have. I thought that I might be able to keep the chickens a secret but the neighbors soon figured it out when the chickens started free ranging in the fenced yard and when a couple of young cockerels started crowing before I got a chance to rehome them. So far, though. No chicken police have arrived at my door. I think its worth the risk: they are hilarious and rewarding pets and we love the eggs.
I say: go for it. Look at the cute little coops on the coop page and get yourself no more than 4 pullets. Stick with the heavier laying breeds who are less likely to be "flighty" and fly over your fence. When living in close proximity to neighbors you need to keep your pets on your property. Keep the coop clean...there won't be smell problems when properly maintained. There will be noise when the hens start laying...they love to announce the egg arrival. So, positioning the coop away from neighbors windows will help.
I don't see the difference between a backyard chicken coop and a backyard rabbit hutch. To me, they have similar impact on the backyard environment. Good luck to you.