According to Engadget, select Apple specialists, who are under embargo until the launch date (so they won’t say who), will have the iPad on sale on Saturday. So if you didn’t order one by mail or to pickup at an Apple Store and don’t want to be the 16th person at a Best Buy, you might have a third option of picking one up. Find one here.
Our money is on Tekserve in NYC having a few. They’ve been Apple favorites for a long time.