Also, for you zombie people, nobody can see your username. On the map, all zombies are just "a zombie." The only way you can tell who's who is if you already have a zombie on your freind list, and then in the status window it will tell you that "you see X number of zombies here. You recognize ______ among them"
Mandingo, just try not to run out of AP out on the street. Get inside a building, preferably one with a door that closes, before you run out of them. Low level zombies cannot open a closed door.
You, as a human, can enter any building as long as it is not "heavily" barricaded. Yes, this means you can step over "strongly," "lightly," or "loosely" barricades.
You as a human can also search for items. You'll want to head to a police station to grab some bulletts and weapons, and a hospital to grab some first aid kits. I'll save you some grief and inform you that you can't really find anything just by searching outside. Mostly, valuable items are inside buildings. From there, you're on your own.