More than a million eager pairs of hands will be gripping the third version of the iPad on its launch day this Thursday, analysts predict. Some 300,000 models of the first iPad were sold on its first day in 2010, and while Apple didn't release launch-day figures for the iPad 2, executives said they were hit with the "mother of all backlogs," PC World notes. Shipping dates for the new tablet, which was unveiled last week, are now behind up to three weeks. (More iPad stories.)