When inventory of the 128GB version of Microsoft's Surface Pro tablet dried up within hours after going on sale Saturday, there were plenty of disappointed shoppers. But there were also many skeptics who charged that Microsoft artificially created the sell-out by under-stocking the $1000 units at its online store, Best Buy and Staples.Related StoriesThree wishes for a better App StoreWill Apple ever build the iCar Steve Jobs wanted to make?
