Apple announced today that the iPad will be available in U.S. stores on April 3rd and can be pre-ordered now. But I recommend holding off until reviewers can put it through its paces.
As we discussed in our previous Apple iPad Why You Want/Need it or Not article, the Pad is not without its limitations. And there are still a number of unanswered questions, including whether the iPad's bright LED-backlit LCD will be comfortable for reading ebooks.
If you really MUST have it, you can pre-order through Apple’s online store and pick it up in an Apple store on April 3rd (late April for 3G models). But you've lived your life this long without an iPad. What's the rush?