One person with a faulty unit was told by Microsoft that it could not replace his faulty adapter and offered him a $20 credit instead. A Microsoft spokesman blamed the decision to stop offering the Wireless Keyboard Adapter on a number of factors, although the Redmond based company did not mention what these factors are.
On the other hand, Microsoft might have a winner with its Surface Power Covers. This is a QWERTY keyboard attachment that is also a protective case, and has an embedded cell that increases the battery life on your slate by 70%. Just released earlier this month, the Power Covers are already out of stock. Since the Microsoft Store won't let you backorder, if you want one, you will have to keep checking to see when they are back in stock.