Over the last year, I’ve been an iPad holdout. If you already have an iPhone and a MacBook, do you really need an iPad, too? Need is a relative term, of course, so let’s use want instead. With Apple’s introduction of the iPad 2 Wednesday, I now want an iPad 2. My reservations have been swiped away, and the only thing standing between me and a shiny new iPad 2 is an absent Buy Now button on Apple’s online store. March 11 is the date Apple will start taking orders, and you can bet the company’s website will be hammered, and for good reason.