If you like making purchases without any sense of when your products will arrive, allow us to brighten your day. The Microsoft Store just started taking pre-orders for the Samsung Series 7 Slate — you remember, the Windows 7 machine sporting Intel’s 1.6GHz Core i5 2467M CPU with integrated graphics and 4GB of RAM, all beneath a 11.6-inch capacitive panel? Sure, you remember. MS is selling it for $1,299 with a 128GB SSD. And the mystery of wondering when it’ll actually ship? That they’ll throw in for free.