During the summer months Nashville stations have to provide a cleaner burning type of fuel, the date for that requirement to end was approaching and stations were letting their inventory of the higher priced fuel dwindle so they could replace it with the cheaper fuel.
When hurricane Ike hit, some refineries were shut down, some lost power and I hear a few were actually damaged. Since there's still power outages and disruption there, our pipeline isn't giving what it normally does.
A couple of stations miscalculated and ran out of gas. Word of this spread and set of a mini-panic, so everyone went and got gas. A LOT of gas. This made almost all (85% or so) of stations run out on Friday. Long lines were seen at the remaining stations that had gas.
By Sunday, a few more stations had gas. Today (wednesday) about 60% have gas. We are expecting additional shipments from elsewhere (I hear NY) and expect to be up and running as normal soon.
Also, today, the gas stations that DO have gas don't have lines. Everyone apparently filled up everything they had over the weekend

Price of gas in Nashville (where you can find it) is 3.95-4.09.