http://brainstormtech.blogs.fortune.cnn.com/2010/03/18/ipad-pre-orders-10000-per-day/?cnn=yes
Tello's tally does not include iPads reserved for pick-up at Apple retail stores on April 3, the day the device goes on sale. But according to the Boy Genius Report — citing its "Apple connects" — Apple's 222 U.S. stores took an average of 700 reservations that first weekend, which would suggest that reservations and online orders are coming at roughly the same rate.
If true, the total number of iPads reserved or pre-ordered in the first week may be close to 400,000.