Microsoft has confirmed that Surface Pro stock will strengthen by 16 February, after both the 64GB and 128GB models sold out quickly at most US retail outlets.\u00a0The head of the Microsoft Surface Team provided a few details about availability in a chat on Twitter. Best Buy Staples and Microsoft stores across the US will be receiving more stock by Saturday, according to Panos Panay.\n@evansturdivant We are shipping more 64gb now to BBY, Staples, MS Store and online. 128gb at BBY and MS Stores by Saturday #winchat\n\u2014 Panos Panay (@panos_panay) February 12, 2013\nLast Saturday, the Surface Pro went on-sale as the second tablet in Microsoft's Surface line. It offers customers an Intel Core i5 processor, starting at $899 for the 64GB model. Early reviewers noted its speediness, but knocked it on form-factor and battery life.\u00a0Even with the quick sell-out, it's not clear just how much stock was offered. Photos from the launch day indicated solid numbers in lines at a few stores, however.\u00a0Microsoft co-founder and chairman Bill Gates sung the praises of the Surface Pro during a Reddit AMA this week.There's no word on expanded availability worldwide.Image: FortuneAnyone plan on purchasing a Surface Pro?