Learning a new city is always fun. Along with understanding the geography and locating your general needs in your general proximity, one also wrestles with the local terminology. With relocation comes reloquation, like I've always said. Below are some interesting people, places, things, and phrases that you have to spend some time in Atlanta to understand.
Buckhead - Buckhead is a village in north Atlanta--fully equipped with Starbuckses, Targets and World Markets--specially designed for white people who are scared of the rest of Atlanta.
Piedmont Park - An enormous, beautiful park in Midtown; also, the neighborhood surrounding this park, inhabited almost entirely by homosexuals. Here's an example conversation involving a variation on this term:
"So, are you new to Atlanta."
"Yeah, I've only been here a couple of weeks."
"Oh, cool. Where do you live?"
"Right off the park."
"No thanks, I'm married."
Atlanta - This is the term locals use to decribe what everyone everwhere else refers to as Hotlanta.
Peachtree - This is another word for road, I think.
4:30 - As you well know, this is a time of day, but it also means that something is awful or sucky. I don't know the etymology exactly, but I'm guessing it came about because right around that time eveything becomes awful and sucky if you're a commuter.