Microsoft has been having troubles keeping the 128GB model Surface Pro tablet on virtual and actual store shelves, but it looks like the drought, as promised, is ending. The tablet's now up for pre-order on the Microsoft Store website with an estimated March 1st ship date. Best Buy will also be receiving shipments of the slate soon and is also willing to take your money now to reserve one. Alas, our friends north of the border in Canada are still without a 128GB Surface purchase option, but at least the folks at the Surface Blog have promised to provide more info on the matter sometime soon. Don't believe us? Head on down to the source and see for yourself.