I got certified in July.
The realistic estimate, Mike, shocked me. In fact, I was totally pissed off when I took Scubaland's PADI certification for "$150". Well, you had to have your own snorkel, fins, and mask--another $140. You had to get the class materials--$70. You had to pay the open dive park fee--for us, Aquarina Springs $60 ($30/day). You had the option to rent a wetsuit, and at the springs you needed it--$36 ($18/day).
The "Hey, I'll get certified just to be certified for $150" ended up costing me over $450!! I felt totally bait-and-switched and would have bailed if a friend hadn't taken a week's vacation and traveled to Austin so we could get certified together.
You'll probably want your own wetsuit, BCD, regulator, and dive computer--anywhere from $700 to $2500 depending on quality.