Vest
Do you want a real shooting vest, like the shotgun guys wear or just something to cover a handgun? I found a cheap and decent vest called a Forager Vest at U.S. Cavalry. It has plenty of pockets, but doesn't look like a quail hunter's and it doesn't make me look like I should be running down a street in Beirut snapping photos of guys with AK's. I think they run about 25 bucks plus S&H. Not as nice as the Domke mentioned above, but not as pricey or "photojournalist" looking. I've got a khaki and a black, and have a mod to make them more wearable in hot weather if you buy one.