The Ipad will be released on April 3rd.
However, there are already about 120,000 pre-orders made until now;
the amount of the pre-orders are expected to be increased since the pre-oders were only started to be accepted from March 12th 2010.
The major cause of this dramtic increase in pre-orders seems to be the great satisfaction that people got by using the previous apple devices such as Ipod and Iphone.
Also, the price differs depending on whether the device contains both Wi-Fi and 3G systems.